Index: dll/win32/comctl32/imagelist.c
===================================================================
--- dll/win32/comctl32/imagelist.c	(revision 40207)
+++ dll/win32/comctl32/imagelist.c	(working copy)
@@ -166,15 +166,14 @@
         && (himl->cy >= cy))
 	return;
 
-    if (cx == 0) cx = himl->cx;
     nNewCount = himl->cCurImage + nImageCount + himl->cGrow;
 
-    imagelist_get_bitmap_size(himl, nNewCount, cx, &sz);
+    imagelist_get_bitmap_size(himl, nNewCount, himl->cx, &sz);
 
     TRACE("Create expanded bitmaps : himl=%p x=%d y=%d count=%d\n", himl, sz.cx, cy, nNewCount);
     hdcBitmap = CreateCompatibleDC (0);
 
-    hbmNewBitmap = ImageList_CreateImage(hdcBitmap, himl, nNewCount, cx);
+    hbmNewBitmap = ImageList_CreateImage(hdcBitmap, himl, nNewCount, himl->cx);
 
     if (hbmNewBitmap == 0)
         ERR("creating new image bitmap (x=%d y=%d)!\n", sz.cx, cy);