defining w and h before if statement, avoiding UnboundLocalError

drawio2py/generator.py

@@ -165,6 +165,7 @@ def generate_library(lib : Dict[str, Cell], file_object : str) -> None:
 		# "w" & "h"
 		geometry = lib.get(key).geometry
 		geometry_class = type(geometry).__name__
+		w, h = 0, 0
 		if geometry_class == "VertexGeometry":
 			try:
 				w = int(geometry.width)