--- libgdal/frmts/wms/gdalwmsdataset.cpp	2014-04-16 14:04:35.000000000 -0600
+++ libgdal/frmts/wms/gdalwmsdataset_new.cpp	2014-05-22 23:27:36.000000000 -0600
@@ -380,7 +380,7 @@
     
     if (ret == CE_None) {
         const char *pszHttpZeroBlockCodes = CPLGetXMLValue(config, "ZeroBlockHttpCodes", "");
-        if(pszHttpZeroBlockCodes == '\0') {
+        if(pszHttpZeroBlockCodes[0] == '\0') {
             m_http_zeroblock_codes.push_back(204);
         } else {
             char **kv = CSLTokenizeString2(pszHttpZeroBlockCodes,",",CSLT_HONOURSTRINGS);