Fixes two type warnings and a missing case option

code/AssxmlExporter.cpp

@@ -72,7 +72,7 @@ static int ioprintf( IOStream * io, const char *format, ... ) {
         return -1;
     }
 
-    static const size_t Size = 4096;
+    static const int Size = 4096;
     char sz[ Size ];
     ::memset( sz, '\0', Size );
     va_list va;

code/ColladaExporter.cpp

@@ -384,6 +384,7 @@ void ColladaExporter::WriteLight(size_t pIndex){
         case aiLightSource_SPOT:
             WriteSpotLight(light);
             break;
+        case aiLightSource_AREA:
         case aiLightSource_UNDEFINED:
         case _aiLightSource_Force32Bit:
             break;

contrib/openddlparser/include/openddlparser/OpenDDLParserUtils.h

@@ -84,7 +84,7 @@ static const unsigned char chartype_table[ 256 ] = {
 template<class T>
 inline
 bool isNumeric( const T in ) {
-	return ( chartype_table[ in ] == 1 );
+	return ( chartype_table[ static_cast<int>( in ) ] == 1 );
 }
 
 template<class T>