[gtk+] build: Avoid xgettext crash on MSYS2

[Matthias Clasen <matthiasc src gnome org>]

commit b10d63c085509bd7800493a85e7bf2df5eb1fe0a
Author: Daiki Ueno <dueno src gnome org>
Date:   Thu Apr 23 09:42:45 2015 +0900

    build: Avoid xgettext crash on MSYS2
    
    isatty() on MSYS2 returns non-zero if the fd is stdout and is redirected
    to /dev/null.  That lets xgettext to produce colorized output and leads
    to an assertion failure during terminal type detection.
    
    Although the problem should be fixed in MSYS2, isatty() could behave
    wrongly in many ways on Windows.  Since gtk+ doesn't need colorized
    output, it would be safer to bypass the terminal dependent code.
    
    See also:
    https://lists.gnu.org/archive/html/bug-gettext/2015-04/msg00004.html
    
    https://bugzilla.gnome.org/show_bug.cgi?id=748346

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index ba8954c..005c678 100644
--- a/configure.ac
+++ b/configure.ac
@@ -668,7 +668,7 @@ ALL_LINGUAS="`grep -v '^#' "$srcdir/po/LINGUAS" | tr '\n' ' '`"
 AM_GLIB_GNU_GETTEXT
 
 AC_MSG_CHECKING([whether xgettext supports ui files])
-if $ac_cv_path_XGETTEXT --output=- --language=Glade $srcdir/gtk/ui/gtkfilechooserwidget.ui > /dev/null 2>&1; 
then
+if $ac_cv_path_XGETTEXT --output=- --color=no --language=Glade $srcdir/gtk/ui/gtkfilechooserwidget.ui > 
/dev/null 2>&1; then
   AC_MSG_RESULT([yes])
 else
   AC_MSG_RESULT([no])