bashism--; Use POSIX-compatible string handling instead.

Originally committed as revision 4806 to svn://svn.ffmpeg.org/ffmpeg/trunk

configure

@@ -1474,13 +1474,13 @@ lavu_version=`grep '#define LIBAVUTIL_VERSION ' "$source_path/libavutil/avutil.h
 if test "$lshared" = "yes" ; then
   echo "BUILD_SHARED=yes" >> config.mak
   echo "PIC=-fPIC -DPIC" >> config.mak
-  echo "SPPMAJOR=${lavc_version/.*/}" >> config.mak
+  echo "SPPMAJOR=${lavc_version%%.*}" >> config.mak
   echo "SPPVERSION=$lavc_version" >> config.mak
-  echo "LAVCMAJOR=${lavc_version/.*/}" >> config.mak
+  echo "LAVCMAJOR=${lavc_version%%.*}" >> config.mak
   echo "LAVCVERSION=$lavc_version" >> config.mak
-  echo "LAVFMAJOR=${lavf_version/.*/}" >> config.mak
+  echo "LAVFMAJOR=${lavf_version%%.*}" >> config.mak
   echo "LAVFVERSION=$lavf_version" >> config.mak
-  echo "LAVUMAJOR=${lavu_version/.*/}" >> config.mak
+  echo "LAVUMAJOR=${lavu_version%%.*}" >> config.mak
   echo "LAVUVERSION=$lavu_version" >> config.mak
 fi
 echo "EXTRALIBS=$extralibs" >> config.mak