Fixes for build with mingw (no warnings in 32 Bit build, even with -wall).

SMD bugfix.
Makefile is up to date now.
Added pack-attribute for aiVector3D and aiVector2D. 

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@132 67173fc5-114c-0410-ac8e-9d2fd5bffc1f

code/PlyLoader.cpp

@@ -593,6 +593,7 @@ float PLYImporter::NormalizeColorValue (PLY::PropertyInstance::ValueUnion val,
 		return (float)val.iUInt / (float)0xFFFF;
 	case EDT_Int:
 		return ((float)val.iInt / (float)0xFF) + 0.5f;
+	default: ;
 	};
 	return 0.0f;
 }
@@ -1077,4 +1078,4 @@ void PLYImporter::LoadMaterial(std::vector<MaterialHelper*>* pvOut)
 		}
 	}
 	return;
-}
+}