emf: fix another hang

Change-Id: I971ba5f422827f3b8fcdb86c447fc48415225eca
(cherry picked from commit fe20502c)
Reviewed-on: https://gerrit.libreoffice.org/16978Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: David Tardon <dtardon@redhat.com>
Tested-by: David Tardon <dtardon@redhat.com>

vcl/source/filter/wmf/enhwmf.cxx

@@ -1728,9 +1728,9 @@ bool EnhWMFReader::ReadHeader()
 
     pWMF->ReadInt32(nRecordCount);
 
-    if (nRecordCount == 0)
+    if (nRecordCount <= 0)
     {
-        SAL_WARN("vcl.emf", "EMF\t\tEMF Header object shows record counter as 0! This shouldn't "
+        SAL_WARN("vcl.emf", "EMF\t\tEMF Header object shows record counter as <= 0! This shouldn't "
                             "be possible... indicator of possible file corruption?");
         return false;
     }