Merge branch 'find_char' into 'master'

Use a char instead of a string in find() where possible

See merge request OpenMW/openmw!781

apps/openmw/mwgui/tooltips.cpp

@@ -273,7 +273,7 @@ namespace MWGui
                         std::string widgetName = userStringPair.first.substr(underscorePos+1, userStringPair.first.size()-(underscorePos+1));
 
                         type = "Property";
-                        size_t caretPos = key.find("^");
+                        size_t caretPos = key.find('^');
                         if (caretPos != std::string::npos)
                         {
                             type = key.substr(0, caretPos);

apps/openmw/mwgui/windowmanagerimp.cpp

@@ -1017,8 +1017,9 @@ namespace MWGui
         if(tag.compare(0, MyGuiPrefixLength, MyGuiPrefix) == 0)
         {
             tag = tag.substr(MyGuiPrefixLength, tag.length());
-            std::string settingSection = tag.substr(0, tag.find(","));
-            std::string settingTag = tag.substr(tag.find(",")+1, tag.length());
+            size_t comma_pos = tag.find(',');
+            std::string settingSection = tag.substr(0, comma_pos);
+            std::string settingTag = tag.substr(comma_pos+1, tag.length());
             
             _result = Settings::Manager::getString(settingTag, settingSection);            
         }

apps/openmw/mwmechanics/character.cpp

@@ -966,7 +966,7 @@ void CharacterController::handleTextKey(const std::string &groupname, SceneUtil:
 
         // The event can optionally contain volume and pitch modifiers
         float volume=1.f, pitch=1.f;
-        if (soundgen.find(" ") != std::string::npos)
+        if (soundgen.find(' ') != std::string::npos)
         {
             std::vector<std::string> tokens;
             split(soundgen, ' ', tokens);