Fix a small logical error when loading moh classes.

We were unconditionally incrementing the number of mohclasses
registered. However, we should actually only increment if the
call to moh_register was successful.

While this probably has never caused problems, I noticed it
and decided to fix it anyway.



git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@187045 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_musiconhold.c

@@ -1219,9 +1219,9 @@ static int load_moh_classes(int reload)
 		}
 
 		/* Don't leak a class when it's already registered */
-		moh_register(class, reload);
-
-		numclasses++;
+		if (!moh_register(class, reload)) {
+			numclasses++;
+		}
 	}