Merge branch 'coverity_fix' into 'master'

Fix some coverity issues

See merge request OpenMW/openmw!1013

apps/openmw/engine.cpp

@@ -407,6 +407,7 @@ OMW::Engine::Engine(Files::ConfigurationManager& configurationManager)
   , mExportFonts(false)
   , mRandomSeed(0)
   , mScriptContext (nullptr)
+  , mLuaManager (nullptr)
   , mFSStrict (false)
   , mScriptBlacklistUse (true)
   , mNewGame (false)
@@ -900,7 +901,7 @@ private:
     Engine* mEngine;
     std::mutex mMutex;
     std::condition_variable mCV;
-    bool mUpdateRequest;
+    bool mUpdateRequest = false;
     double mDt = 0;
     bool mIsGuiMode = false;
     std::optional<std::thread> mThread;

apps/openmw/mwbase/luamanager.hpp

@@ -42,14 +42,14 @@ namespace MWBase
 
         struct ActorControls
         {
-            bool mDisableAI;
-            bool mControlledFromLua;
+            bool mDisableAI = false;
+            bool mControlledFromLua = false;
 
-            bool mJump;
-            bool mRun;
-            float mMovement;
-            float mSideMovement;
-            float mTurn;
+            bool mJump = false;
+            bool mRun = false;
+            float mMovement = 0;
+            float mSideMovement = 0;
+            float mTurn = 0;
         };
 
         virtual ActorControls* getActorControls(const MWWorld::Ptr&) const = 0;

components/lua/luastate.cpp

@@ -82,7 +82,9 @@ namespace LuaUtil
     sol::table LuaState::getMutableFromReadOnly(const sol::userdata& ro)
     {
         sol::stack::push(mLua, ro);
-        lua_getmetatable(mLua, -1);
+        int ok = lua_getmetatable(mLua, -1);
+        assert(ok);
+        (void)ok;
         sol::table res = sol::stack::pop<sol::table>(mLua);
         lua_pop(mLua, 1);
         return res;