[gimp] configure: the right way to check for maintainer-mode is $USE_MAINTAINER_MODE

[Michael Natterer <mitch src gnome org>]

commit 5144e7e47c7f589080df092e22459fb88911f045
Author: Michael Natterer <mitch gimp org>
Date:   Sat Oct 29 23:51:50 2011 +0200

    configure: the right way to check for maintainer-mode is $USE_MAINTAINER_MODE

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index d78623a..556f418 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1676,7 +1676,7 @@ AC_PATH_PROGS(PERL,perl5 perl perl5.005 perl5.004,perl)
 
 AC_ARG_WITH(pdbgen,
             [  --with-pdbgen           use 'pdbgen' code generation tool],,
-  with_pdbgen=$enable_maintainer_mode)
+  with_pdbgen=$USE_MAINTAINER_MODE)
 
 AM_CONDITIONAL(WITH_PDBGEN, test "x$with_pdbgen" = xyes)