fixed a future-proof warning, converting 'if not node:' to 'if node is None:' to match the style of the other function. Should not affect functionality of the extension, but simply make the warning message go away.

git-svn-id: https://eggbotcode.googlecode.com/svn/trunk@198 72233254-1b6c-9e9c-5072-401df62706fb

inkscape_contributed/eggbot_machinetoolfixup.py

@@ -56,7 +56,7 @@ class EggbotMachineToolFixup( inkex.Effect ):
 		  - Remove font name info so that we don't process this again
 		'''
 
-		if not node:
+		if node is None:
 			return
 
 		style_str = node.get( 'style' )