[libgda] Correction for bug #630655

[Vivien Malerba <vivien src gnome org>]

commit a953bd67bdde2cafbec00f264e471aa0d2ef067e
Author: Vivien Malerba <malerba gnome-db org>
Date:   Mon Sep 27 20:34:28 2010 +0200

    Correction for bug #630655

 m4/mdbtools.m4 |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/m4/mdbtools.m4 b/m4/mdbtools.m4
index 2421ef4..ed959f6 100644
--- a/m4/mdbtools.m4
+++ b/m4/mdbtools.m4
@@ -197,6 +197,8 @@ int main() {
 	    fi
 	    CFLAGS="$save_CFLAGS"
 	fi
+    else
+        AM_CONDITIONAL(MDB,[false])
     fi
 
     AC_SUBST(MDB_LIBS)