fix some warnings in network.c

dongle_network.c

@@ -18,9 +18,7 @@ int get_signal_strength(struct ubus_context *ctx, struct ubus_object *obj,
 
 	free(ip_addr);
 	return print_to_ubus(response, ctx, req);
-fail_argument:
-	free(ip_addr);
-	return UBUS_STATUS_INVALID_ARGUMENT;
+
 fail_unknown:
 	free(ip_addr);
 fail_strdup:
@@ -43,9 +41,7 @@ int connect_network(struct ubus_context *ctx, struct ubus_object *obj,
 
 	free(ip_addr);
 	return print_to_ubus(response, ctx, req);
-fail_argument:
-	free(ip_addr);
-	return UBUS_STATUS_INVALID_ARGUMENT;
+
 fail_unknown:
 	free(ip_addr);
 fail_strdup:
@@ -68,9 +64,7 @@ int disconnect(struct ubus_context *ctx, struct ubus_object *obj,
 
 	free(ip_addr);
 	return print_to_ubus(response, ctx, req);
-fail_argument:
-	free(ip_addr);
-	return UBUS_STATUS_INVALID_ARGUMENT;
+
 fail_unknown:
 	free(ip_addr);
 fail_strdup:
@@ -94,9 +88,7 @@ int modem_state(struct ubus_context *ctx, struct ubus_object *obj,
 
 	free(ip_addr);
 	return print_to_ubus(response, ctx, req);
-fail_argument:
-	free(ip_addr);
-	return UBUS_STATUS_INVALID_ARGUMENT;
+
 fail_unknown:
 	free(ip_addr);
 fail_strdup:
@@ -120,9 +112,7 @@ int enable_roaming(struct ubus_context *ctx, struct ubus_object *obj,
 
 	free(ip_addr);
 	return print_to_ubus(response, ctx, req);
-fail_argument:
-	free(ip_addr);
-	return UBUS_STATUS_INVALID_ARGUMENT;
+
 fail_unknown:
 	free(ip_addr);
 fail_strdup:
@@ -146,9 +136,7 @@ int disable_roaming(struct ubus_context *ctx, struct ubus_object *obj,
 
 	free(ip_addr);
 	return print_to_ubus(response, ctx, req);
-fail_argument:
-	free(ip_addr);
-	return UBUS_STATUS_INVALID_ARGUMENT;
+
 fail_unknown:
 	free(ip_addr);
 fail_strdup:
@@ -172,9 +160,7 @@ int roam_status(struct ubus_context *ctx, struct ubus_object *obj,
 
 	free(ip_addr);
 	return print_to_ubus(response, ctx, req);
-fail_argument:
-	free(ip_addr);
-	return UBUS_STATUS_INVALID_ARGUMENT;
+
 fail_unknown:
 	free(ip_addr);
 fail_strdup: