Changes to detect unresolved references (REF NOT FOUND) during HTML conversion

Filenames with underscores are no longer reported as errant uses of '_' character
Minor GUI display tweeks.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@10326 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

utils/tex2rtf/src/htmlutil.cpp

@@ -1907,6 +1907,9 @@ bool HTMLOnArgument(int macroId, int arg_no, bool start)
             if (helpRefText)
               TraverseChildrenFromChunk(helpRefText);
             TexOutput(" (REF NOT FOUND)");
+            wxString errBuf;
+            errBuf.Printf("Warning: unresolved reference '%s'", refName);
+            OnInform((char *)errBuf.c_str());
           }
         }
         else TexOutput("??");