Use wxString's empty() when checking if the string is (non-)empty throughout wx.

Instead of constructs such as if "( s.length() )" and "if (s.length() > 0)" use "if ( !s.empty() )" instead. Similarly for "if (s.length() == 0)" or "if ( s.IsNull() )", use "if ( s.empty() )".
No code changes intended except for a few instances where a construct like "if ( s.length() && wxFileExists(s) )" was changed to not check the length of the string and let wxFileExists handle such cases.



git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66728 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/translation.cpp

@@ -1741,7 +1741,7 @@ wxArrayString wxFileTranslationsLoader::GetAvailableTranslations(const wxString&
           i != prefixes.end();
           ++i )
     {
-        if (i->length() == 0)
+        if ( i->empty() )
             continue;
         wxDir dir;
         if ( !dir.Open(*i) )