Ignore footprint field if empty

test.py

@@ -27,6 +27,9 @@ def checkPartName(partDEFName, partF1Name):
 		errorOnLine(lineNum, 'Part DEF name and F1 name do not match')
 		
 def checkFootprint(lineNum, footprintField):
+	if footprintField == '':
+		return
+
 	parts = footprintField.split(':')
 
 	if parts[0] != libraryName: