follow up e4f410b

Author: alexbruy

python/plugins/fTools/tools/doGeometry.py

@@ -392,7 +392,7 @@ def single_to_multi( self ):
             else:
               idVarMod = idVar
           else:
-            idVar = ""
+            idVarMod = ""
           if idVarMod == iMod or merge_all:
             if first:
               atts = atMap