[cogl] Fix the GBM_MICRO macro

[Neil Roberts <nroberts src gnome org>]

commit 64472027fb5750971e94c0b4c6c624a39e5abe2f
Author: Neil Roberts <neil linux intel com>
Date:   Wed Jul 3 12:04:31 2013 +0100

    Fix the GBM_MICRO macro
    
    The version of gbm can sometimes be suffixed with ‘-devel’. This was
    making the GBM_MICRO define come out as 0-devel which was generating a
    warning when it was used in a #if check. This patch makes it chop off
    anything after a ‘-’ using sed.
    
    Reviewed-by: Robert Bragg <robert linux intel com>

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 8d38d90..5d9094a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1075,7 +1075,7 @@ AS_IF([test "x$enable_kms_egl_platform" = "xyes"],
         GBM_VERSION=`$PKG_CONFIG --modversion gbm`
         GBM_MAJOR=`echo $GBM_VERSION | cut -d'.' -f1`
         GBM_MINOR=`echo $GBM_VERSION | cut -d'.' -f2`
-        GBM_MICRO=`echo $GBM_VERSION | cut -d'.' -f3`
+        GBM_MICRO=`echo $GBM_VERSION | cut -d'.' -f3 | sed 's/-.*//'`
 
         AC_DEFINE_UNQUOTED([COGL_GBM_MAJOR], [$GBM_MAJOR], [The major version for libgbm])
         AC_DEFINE_UNQUOTED([COGL_GBM_MINOR], [$GBM_MINOR], [The minor version for libgbm])