Don't disable Unicode menus on Windows NT and later due to random errors.

 src/w32menu.c: Include w32heap.h.
 (add_menu_item): If the call to AppendMenuW (via
 unicode_append_menu) fails, disable Unicode menus only if we are
 running on Windows 9X/Me.

2 files changed, 14 insertions, 2 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 06d65c7bf33..8b23806e57f 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,10 @@
+2012-04-26  Eli Zaretskii  <eliz@gnu.org>
+
+        * w32menu.c: Include w32heap.h.
+        (add_menu_item): If the call to AppendMenuW (via
+        unicode_append_menu) fails, disable Unicode menus only if we are
+        running on Windows 9X/Me.
+
 2012-04-24  Andreas Schwab  <schwab@linux-m68k.org>
 
         * .gdbinit (xpr): Handle USE_2_TAGS_FOR_INTS.
diff --git a/src/w32menu.c b/src/w32menu.c
index 9091cb81627..5b95a083d90 100644
--- a/src/w32menu.c
+++ b/src/w32menu.c
@@ -48,6 +48,8 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "dispextern.h"
 
+#include "w32heap.h"    /* for osinfo_cache */
+
 #undef HAVE_DIALOGS /* TODO: Implement native dialogs.  */
 
 #ifndef TRUE
@@ -1498,8 +1500,11 @@ add_menu_item (HMENU menu, widget_value *wv, HMENU item)
             AppendMenu (menu, fuFlags,
                         item != NULL ? (UINT) item: (UINT) wv->call_data,
                         out_string);
-          /* Don't use Unicode menus in future.  */
-          unicode_append_menu = NULL;
+          /* Don't use Unicode menus in future, unless this is Windows
+             NT or later, where a failure of AppendMenuW does NOT mean
+             Unicode menus are unsupported.  */
+          if (osinfo_cache.dwPlatformId != VER_PLATFORM_WIN32_NT)
+            unicode_append_menu = NULL;
         }
 
       if (unicode_append_menu && (fuFlags & MF_OWNERDRAW))