handle locales where AM/PM strings are empty

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@59681 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/datetimefmt.cpp

@@ -1330,6 +1330,13 @@ wxDateTime::ParseFormat(const wxString& date,
                 {
                     wxString am, pm, token = GetAlphaToken(input);
                     
+                    // some locales have empty AM/PM tokens and thus when formatting
+                    // dates with the %p specifier mpthomg os gemerated; when trying to
+                    // parse them back, we get an empty token here... but that's not
+                    // an error.
+                    if (token.empty())
+                        break;
+
                     GetAmPmStrings(&am, &pm);
                     if (am.empty() && pm.empty())
                         return NULL;  // no am/pm strings defined