--- a\src\iup_names.c	Mon Oct 05 17:15:42 2015
+++ b\src\iup_names.c	Tue Jan 16 22:20:35 2018
@@ -64,6 +64,7 @@
     return;
 
   ih_array = (Ihandle**)malloc(count * sizeof(Ihandle*));
+  memset(ih_array, 0, count * sizeof(Ihandle*));
 
   /* store the handles before updating so we can remove elements in the loop */
   name = iupTableFirst(inames_strtable);