debug meshing again...

src/Meshing/Internal.py

@@ -47,6 +47,10 @@ class InternalMeshing(AMeshingTool):
         if profiles is None:
             return []
 
+        for p in profiles:
+            if len(p) < 1:
+                return []
+
         guide_list = self.get_guide_list(reach, profiles)
         if guide_list is None:
             return []