diff -aur gdal-1.11.5/frmts/wms/gdalwmsdataset.cpp gdal-1.11.5.new/frmts/wms/gdalwmsdataset.cpp
--- gdal-1.11.5/frmts/wms/gdalwmsdataset.cpp	2016-07-01 10:55:06.000000000 +0200
+++ gdal-1.11.5.new/frmts/wms/gdalwmsdataset.cpp	2017-07-28 01:42:12.689071430 +0200
@@ -380,7 +380,7 @@
     
     if (ret == CE_None) {
         const char *pszHttpZeroBlockCodes = CPLGetXMLValue(config, "ZeroBlockHttpCodes", "");
-        if(pszHttpZeroBlockCodes == '\0') {
+        if(*pszHttpZeroBlockCodes == '\0') {
             m_http_zeroblock_codes.push_back(204);
         } else {
             char **kv = CSLTokenizeString2(pszHttpZeroBlockCodes,",",CSLT_HONOURSTRINGS);
diff -aur gdal-1.11.5/ogr/ogrsf_frmts/vfk/vfkfeature.cpp gdal-1.11.5.new/ogr/ogrsf_frmts/vfk/vfkfeature.cpp
--- gdal-1.11.5/ogr/ogrsf_frmts/vfk/vfkfeature.cpp	2016-07-01 10:55:03.000000000 +0200
+++ gdal-1.11.5.new/ogr/ogrsf_frmts/vfk/vfkfeature.cpp	2017-07-28 01:41:49.675883164 +0200
@@ -245,7 +245,7 @@
     for (poChar = pszLine; *poChar != '\0' && *poChar != ';'; poChar++)
         /* skip data block name */
         ;
-    if (poChar == '\0')
+    if (*poChar == '\0')
         return FALSE; /* nothing to read */
 
     poChar++; /* skip ';' after data block name*/