consolidate random number logic

Note, I suspect Rng::rollClosedProbability() is not needed.  The only difference between it and rollProbability() is that one time in 37k (on Windows), it will give an output of 1.0.
On some versions of Linux, the value of 1.0 will occur about 1 time in 4 billion.

(cherry picked from commit 3f28634d1f)

# Conflicts:
#	apps/openmw/mwclass/creature.cpp
#	apps/openmw/mwclass/npc.cpp
#	apps/openmw/mwgui/pickpocketitemmodel.cpp
#	apps/openmw/mwgui/waitdialog.cpp
#	apps/openmw/mwmechanics/combat.cpp
#	apps/openmw/mwmechanics/mechanicsmanagerimp.cpp
#	components/CMakeLists.txt
#	libs/openengine/misc/rng.cpp

apps/openmw/mwclass/creature.cpp

@@ -250,7 +250,7 @@ namespace MWClass
 
         float hitchance = MWMechanics::getHitChance(ptr, victim, ref->mBase->mData.mCombat);
 
-        if(OEngine::Misc::Rng::roll0to99() >= hitchance)
+        if(OEngine::Misc::Rng::rollProbability() >= hitchance/100.0f)
         {
             victim.getClass().onHit(victim, 0.0f, false, MWWorld::Ptr(), ptr, false);
             MWMechanics::reduceWeaponCondition(0.f, false, weapon, ptr);

apps/openmw/mwclass/npc.cpp

@@ -382,7 +382,7 @@ namespace MWClass
 
         float hitchance = MWMechanics::getHitChance(ptr, victim, ptr.getClass().getSkill(ptr, weapskill));
 
-        if (OEngine::Misc::Rng::roll0to99() >= hitchance)
+        if (OEngine::Misc::Rng::rollProbability() >= hitchance / 100.0f)
         {
             othercls.onHit(victim, 0.0f, false, weapon, ptr, false);
             MWMechanics::reduceWeaponCondition(0.f, false, weapon, ptr);

apps/openmw/mwgui/pickpocketitemmodel.cpp

@@ -20,7 +20,7 @@ namespace MWGui
         {
             for (size_t i = 0; i<mSourceModel->getItemCount(); ++i)
             {
-                if (OEngine::Misc::Rng::roll0to99() > chance)
+                if (chance <= OEngine::Misc::Rng::roll0to99())
                     mHiddenItems.push_back(mSourceModel->getItem(i));
             }
         }

apps/openmw/mwgui/waitdialog.cpp

@@ -155,9 +155,8 @@ namespace MWGui
                 if (!region->mSleepList.empty())
                 {
                     // figure out if player will be woken while sleeping
-                    int x = OEngine::Misc::Rng::rollDice(hoursToWait);
                     float fSleepRandMod = world->getStore().get<ESM::GameSetting>().find("fSleepRandMod")->getFloat();
-                    if (x < fSleepRandMod * hoursToWait)
+                    if (OEngine::Misc::Rng::rollProbability() > fSleepRandMod)
                     {
                         float fSleepRestMod = world->getStore().get<ESM::GameSetting>().find("fSleepRestMod")->getFloat();
                         mInterruptAt = hoursToWait - int(fSleepRestMod * hoursToWait);

apps/openmw/mwmechanics/combat.cpp

@@ -187,7 +187,7 @@ namespace MWMechanics
         int skillValue = attacker.getClass().getSkill(attacker,
                                            weapon.getClass().getEquipmentSkill(weapon));
 
-        if (OEngine::Misc::Rng::roll0to99() >= getHitChance(attacker, victim, skillValue))
+        if (OEngine::Misc::Rng::rollProbability() >= getHitChance(attacker, victim, skillValue) / 100.0f)
         {
             victim.getClass().onHit(victim, 0.0f, false, projectile, attacker, false);
             MWMechanics::reduceWeaponCondition(0.f, false, weapon, attacker);

apps/openmw/mwmechanics/mechanicsmanagerimp.cpp

@@ -741,7 +741,7 @@ namespace MWMechanics
         float x = 0;
         float y = 0;
 
-        int roll = OEngine::Misc::Rng::roll0to99();
+        float roll = OEngine::Misc::Rng::rollClosedProbability() * 100;
 
         if (type == PT_Admire)
         {

components/CMakeLists.txt

@@ -166,14 +166,9 @@ include_directories(${BULLET_INCLUDE_DIRS} ${CMAKE_CURRENT_BINARY_DIR})
 add_library(components STATIC ${COMPONENT_FILES} ${MOC_SRCS} ${ESM_UI_HDR})
 
 target_link_libraries(components 
-    ${Boost_SYSTEM_LIBRARY}
+    ${Boost_LIBRARIES} 
-    ${Boost_FILESYSTEM_LIBRARY}
-    ${Boost_THREAD_LIBRARY}
-    ${Boost_PROGRAM_OPTIONS_LIBRARY}
-    ${Boost_WAVE_LIBRARY}
     ${OGRE_LIBRARIES}
     ${OENGINE_LIBRARY}    
-    ${BULLET_LIBRARIES}
 )
 
 if (WIN32)

libs/openengine/misc/rng.cpp

@@ -26,4 +26,4 @@ namespace Misc {
     }
 
 }
-}
+}