[frogr] Fix stupid mistake in configure.ac

[Mario Sanchez Prada <msanchez src gnome org>]

commit 45cf61189cb0c6997eef961731041f63771149bb
Author: Mario Sanchez Prada <msanchez igalia com>
Date:   Fri Apr 22 20:45:15 2011 +0200

    Fix stupid mistake in configure.ac

 configure.ac |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 58fd650..e5b62f2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -60,7 +60,6 @@ AM_CONDITIONAL([HAVE_MAC_INTEGRATION],[test "x$platform" = "xmacosx"])
 # Select target version of GTK to use
 
 AC_MSG_CHECKING([Checking GTK+ version to use])
-with_gtk=2.0
 
 if test "x$platform" = "xgnome"; then
    # For the GNOME platform allow using GTK2 and GTK3 (default for GNOME)
@@ -71,6 +70,9 @@ if test "x$platform" = "xgnome"; then
            *) AC_MSG_ERROR([Wrong GTK+ version]) ;;
            esac],
            [with_gtk=3.0])
+else
+   # Other non-GNOME platforms (e.g. MacOSX) to support GTK2 only
+   with_gtk=2.0
 fi
 
 AC_MSG_RESULT([$with_gtk])