Blind fix for bug #1209944, wxFileConfig constructor corrupts the stack

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@34423 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/fileconf.cpp

@@ -495,7 +495,7 @@ wxFileConfig::wxFileConfig(wxInputStream &inStream, wxMBConv& conv)
         char buf[1024];
         do
         {
-            inStream.Read(buf, WXSIZEOF(buf));
+            inStream.Read(buf, WXSIZEOF(buf)-1);  // leave room for the NULL
 
             const wxStreamError err = inStream.GetLastError();