who thought tolower should return int??

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@4047 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/endpoints/mod_portaudio/mod_portaudio.c

@@ -1502,7 +1502,7 @@ static switch_status_t do_flags(char **argv, int argc, switch_stream_handle_t *s
     for (x = 1; x < argc; x++) {
         flag_str = argv[x];
         for(p = flag_str; *p; p++) {
-            *p = tolower(*p);
+            *p = (char)tolower(*p);
         }
     
         if (strstr(flag_str, "ear")) {