configure.ac: Set AC_CONFIG_MACRO_DIR to common/m4 to point autoconf to our M4 macros.

Original commit message from CVS:
* configure.ac:
Set AC_CONFIG_MACRO_DIR to common/m4 to point autoconf to
our M4 macros.

ChangeLog

+2008-12-04  Sebastian Dröge  <sebastian.droege@collabora.co.uk>
+
+	* configure.ac:
+	Set AC_CONFIG_MACRO_DIR to common/m4 to point autoconf to
+	our M4 macros.
+
 2008-12-04  Sebastian Dröge  <sebastian.droege@collabora.co.uk>
 
 	* ffmpegrev:

common @ a8728f3f

-Subproject commit 9a486164b87586f7b936a55b1ee56a14cd4e2c73
+Subproject commit a8728f3f810904c94f0b6678a7633d551514f335

configure.ac

@@ -21,6 +21,9 @@ AS_NANO(GST_CVS="no", GST_CVS="yes")
 dnl can autoconf find the source ?
 AC_CONFIG_SRCDIR([ext/ffmpeg/gstffmpeg.c])
 
+dnl where are our m4 macros ?
+AC_CONFIG_MACRO_DIR([common/m4])
+
 dnl define the output header for config
 AM_CONFIG_HEADER([config.h])