since the module API is changing, it's a good time to const-ify the description() and key() return values

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@18552 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_osplookup.c

@@ -631,7 +631,7 @@ int reload(void)
 	return(0);
 }
 
-char *description(void)
+const char *description(void)
 {
 	return("Open Settlement Protocol Applications");
 }
@@ -643,7 +643,7 @@ int usecount(void)
 	return(res);
 }
 
-char *key()
+const char *key()
 {
 	return(ASTERISK_GPL_KEY);
 }