fixed argv[0] out of bounds error (argc can be 0 when wxEntry is manually called in a plugin environment for example)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@35888 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/cmdline.cpp

@@ -241,7 +241,8 @@ void wxCmdLineParserData::SetArguments(const wxString& cmdLine)
 {
     m_arguments.clear();
 
-    m_arguments.push_back(wxTheApp ? wxTheApp->argv[0] : _T(""));
+    m_arguments.push_back(
+        (wxTheApp && wxTheApp->argc > 0) ? wxTheApp->argv[0] : wxEmptyString);
 
     wxArrayString args = wxCmdLineParser::ConvertStringToArgs(cmdLine);