Warn about wrong version of mpg123 (bug #3392)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@4862 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/Makefile

@@ -58,6 +58,15 @@ endif
 depend: .depend
 
 .depend:
+	@if ! which mpg123 &>/dev/null ; then \
+		echo "*** You don't have mpg123 installed. You're going to need ***";\
+		echo "***       it if you want MusicOnHold                      ***";\
+	elif ! mpg123 --longhelp 2>&1 | grep .59r &>/dev/null ; then \
+			echo "*************************************************************";\
+			echo "*** You have the WRONG version of mpg123... you need .59r ***";\
+			echo "*** Use 'make mpg123' to get the right verison            ***";\
+			echo "*************************************************************";\
+ 	fi
 	../mkdep $(CFLAGS) `ls *.c`	
 
 env: