- add convenience functions BLI_split_dir_part / BLI_split_file_part, which just call BLI_split_dirfile().

- add a fixed value for bprogdir (the dir of bprogname), since it was being used for resource lookups.

source/gameengine/Ketsji/KX_PythonInit.cpp

@@ -502,7 +502,7 @@ static PyObject* gPyGetBlendFileList(PyObject*, PyObject* args)
 		BLI_path_abs(cpath, gp_GamePythonPath);
 	} else {
 		/* Get the dir only */
-		BLI_split_dirfile(gp_GamePythonPath, cpath, NULL, sizeof(cpath), 0);
+		BLI_split_dir_part(gp_GamePythonPath, cpath, sizeof(cpath));
 	}
 
 	if((dp  = opendir(cpath)) == NULL) {
@@ -1732,7 +1732,7 @@ static void initPySysObjects__append(PyObject *sys_path, char *filename)
 	PyObject *item;
 	char expanded[FILE_MAXDIR + FILE_MAXFILE];
 	
-	BLI_split_dirfile(filename, expanded, NULL, sizeof(expanded), 0); /* get the dir part of filename only */
+	BLI_split_dir_part(filename, expanded, sizeof(expanded)); /* get the dir part of filename only */
 	BLI_path_abs(expanded, gp_GamePythonPath); /* filename from lib->filename is (always?) absolute, so this may not be needed but it wont hurt */
 	BLI_cleanup_file(gp_GamePythonPath, expanded); /* Dont use BLI_cleanup_dir because it adds a slash - BREAKS WIN32 ONLY */
 	item= PyUnicode_DecodeFSDefault(expanded);