Fix error passing in directories to clang & autopep8 utilities

Error in [0] broke "make format PATHS=source/creator" for e.g.

Thanks to @aras_p for pointing out & suggesting the fix.

[0]: 93a5e1a4

utils_maintenance/autopep8_format_paths.py

@@ -35,7 +35,7 @@ def compute_paths(paths, use_default_paths):
     else:
         paths = [
             f for f in paths
-            if os.path.isfile(f) and f.endswith(extensions)
+            if os.path.isdir(f) or (os.path.isfile(f) and f.endswith(extensions))
         ]
 
     if os.sep != "/":

utils_maintenance/clang_format_paths.py

@@ -64,7 +64,7 @@ def compute_paths(paths, use_default_paths):
         # "Operating" on files that will be filtered out later on.
         paths = [
             f for f in paths
-            if os.path.isfile(f) and f.endswith(extensions)
+            if os.path.isdir(f) or (os.path.isfile(f) and f.endswith(extensions))
         ]
 
     if os.sep != "/":