fix to float detection in postprocess_instance_ufo.py

misc/tools/postprocess_instance_ufo.py

@@ -20,7 +20,7 @@ def ufo_set_wws(ufo):
 def fix_fractional_advance_width(ufo):
   for g in ufo:
     w = int(round(g.width))
-    if w != g.width:
+    if str(g.width) != str(w):
       # set twice to work around bug or weird behavior in defcon.
       # If we don't do this, then fractional widths with .0 fraction are
       # not updated to integer values.