Fix a confusing variable name

extern/sdl4ogre/sdlinputwrapper.cpp

@@ -241,8 +241,8 @@ namespace SFO
 
         //eep, wrap the pointer manually if the input driver doesn't support
         //relative positioning natively
-        int success = SDL_SetRelativeMouseMode(relative ? SDL_TRUE : SDL_FALSE);
+        bool success = SDL_SetRelativeMouseMode(relative ? SDL_TRUE : SDL_FALSE) == 0;
-        if(relative && success != 0)
+        if(relative && !success)
             mWrapPointer = true;
 
         //now remove all mouse events using the old setting from the queue