Use proper return values for a few application modules

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@120129 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_chanisavail.c

@@ -165,7 +165,8 @@ static int unload_module(void)
 
 static int load_module(void)
 {
-	return ast_register_application(app, chanavail_exec, synopsis, descrip);
+	return ast_register_application(app, chanavail_exec, synopsis, descrip) ?
+		AST_MODULE_LOAD_DECLINE : AST_MODULE_LOAD_SUCCESS;
 }
 
 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Check channel availability");

apps/app_channelredirect.c

@@ -89,7 +89,8 @@ static int unload_module(void)
 
 static int load_module(void)
 {
-	return ast_register_application(app, asyncgoto_exec, synopsis, descrip);
+	return ast_register_application(app, asyncgoto_exec, synopsis, descrip) ?
+		AST_MODULE_LOAD_DECLINE : AST_MODULE_LOAD_SUCCESS;
 }
 
 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Redirects a given channel to a dialplan target");

apps/app_disa.c

@@ -363,7 +363,8 @@ static int unload_module(void)
 
 static int load_module(void)
 {
-	return ast_register_application(app, disa_exec, synopsis, descrip);
+	return ast_register_application(app, disa_exec, synopsis, descrip) ?
+		AST_MODULE_LOAD_DECLINE : AST_MODULE_LOAD_SUCCESS;
 }
 
 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "DISA (Direct Inward System Access) Application");