Core/Misc: Fix invalid utf-8 comments

dep/g3dlite/include/G3D/Matrix3.h

@@ -349,7 +349,7 @@ public:
     // "You might be tempted to write [...] them as inline functions 
     // inside their respective header files, but this is something you 
     // must definitely not do. An inline function can be duplicated 
-    // in every file in which it appears œóõ½ and this duplication 
+    // in every file in which it appears and this duplication 
     // includes the static object definition. Because inline functions 
     // automatically default to internal linkage, this would result in 
     // having multiple static objects across the various translation 

dep/g3dlite/include/G3D/Ray.h

@@ -36,7 +36,7 @@ private:
     
     /** The following are for the "ray slope" optimization from
       "Fast Ray / Axis-Aligned Bounding Box Overlap Tests using Ray Slopes" 
-      by Martin Eisemann, Thorsten Grosch, Stefan M<EFBFBD>üller and Marcus Magnor
+      by Martin Eisemann, Thorsten Grosch, Stefan Müller and Marcus Magnor
       Computer Graphics Lab, TU Braunschweig, Germany and
       University of Koblenz-Landau, Germany */
     enum Classification {MMM, MMP, MPM, MPP, PMM, PMP, PPM, PPP, POO, MOO, OPO, OMO, OOP, OOM, OMM, OMP, OPM, OPP, MOM, MOP, POM, POP, MMO, MPO, PMO, PPO};    

src/tools/mmaps_generator/TerrainBuilder.cpp

@@ -404,7 +404,6 @@ namespace MMAP
                 useTerrain = true;
                 useLiquid = true;
                 uint8 liquidType = MAP_LIQUID_TYPE_NO_WATER;
-                // FIXME: "warning: the address of ‘liquid_type’ will always evaluate as ‘true’"
 
                 // if there is no liquid, don't use liquid
                 if (!meshData.liquidVerts.size() || !ltriangles.size())