Cast data as char * before using S_OR

This is required for compiling successfully under dev mode


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.8@320716 65c4cc65-6c06-0410-ace0-fbb531ad65f3

addons/chan_mobile.c

@@ -1188,7 +1188,7 @@ static int mbl_devicestate(void *data)
 	int res = AST_DEVICE_INVALID;
 	struct mbl_pvt *pvt;
 
-	device = ast_strdupa(S_OR(data, ""));
+	device = ast_strdupa(S_OR((char *) data, ""));
 
 	ast_debug(1, "Checking device state for device %s\n", device);