Fix capturing non-ASCII output using wxExecute().

Explicitly use wxConvLibc with wxTextInputStream to make sure we correctly
decode non-ASCII data in the subprocess output.

This is a hack, the real solution would be to make wxTextInputStream work
properly with wxConvAuto.

See #14720.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74946 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -598,6 +598,7 @@ wxMSW:
 wxOSX:
 
 - Improve handling of keyboard entry using IME (minoki).
+- Fix capturing non-ASCII output using wxExecute().
 - Fix column sorting UI in wxDataViewCtrl (Myrsloik).
 
 

src/common/utilscmn.cpp

@@ -630,7 +630,10 @@ static bool ReadAll(wxInputStream *is, wxArrayString& output)
     // the stream could be already at EOF or in wxSTREAM_BROKEN_PIPE state
     is->Reset();
 
-    wxTextInputStream tis(*is);
+    // Notice that wxTextInputStream doesn't work correctly with wxConvAuto
+    // currently, see #14720, so use the current locale conversion explicitly
+    // under assumption that any external program should be using it too.
+    wxTextInputStream tis(*is, " \t", wxConvLibc);
 
     for ( ;; )
     {