[cogl] build: Fix the Win32 platform test for GLES1

[Damien Lespiau <dlespiau src gnome org>]

commit 0ac8135b873c80c73cf5468dd2d2e01118bc29e7
Author: Damien Lespiau <damien lespiau intel com>
Date:   Thu May 12 14:26:54 2011 +0100

    build: Fix the Win32 platform test for GLES1
    
    We want to bail out if trying to configure Cogl with GLES1 on Windows.
    Not the opposite.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 1fda551..8a8404c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -307,7 +307,7 @@ AC_ARG_ENABLE(
 )
 AS_IF([test "x$enable_gles1" = "xyes"],
       [
-        AS_IF([test "x$platform_win32" != "xyes"],
+        AS_IF([test "x$platform_win32" = "xyes"],
 	      [AC_MSG_ERROR([GLES 1 not available for win32])])
 
         DRIVER_COUNT=$((DRIVER_COUNT + 1))