recast and detour patch now builds again with GCC

- rearrange structs to work for 64bit
- define all vars before goto's
- ifdefs for qsort_r/qsort_s
- dont cast pointers to int only for NULL checks
- dont printf STR_String directly, get the char pointer from it

also minor change to gpu py module, no need to pass empty tuple to PyObject_CallObject, can just be NULL

source/gameengine/Ketsji/KX_NavMeshObject.cpp

@@ -282,7 +282,7 @@ bool KX_NavMeshObject::BuildNavMesh()
 
 	if (GetMeshCount()==0)
 	{
-		printf("Can't find mesh for navmesh object: %s \n", m_name);
+		printf("Can't find mesh for navmesh object: %s \n", m_name.ReadPtr());
 		return false;
 	}
 
@@ -294,7 +294,7 @@ bool KX_NavMeshObject::BuildNavMesh()
 							dmeshes, dvertices, ndvertsuniq, dtris, ndtris, vertsPerPoly ) 
 			|| vertsPerPoly<3)
 	{
-		printf("Can't build navigation mesh data for object:%s \n", m_name);
+		printf("Can't build navigation mesh data for object:%s \n", m_name.ReadPtr());
 		return false;
 	}