Use NET_Status instead of int.

Co-authored-by: Ryan C. Gordon <icculus@icculus.org>

Author: andy5995

src/SDL_net.c

@@ -282,9 +282,9 @@ static int SDLCALL ResolverThread(void *data)
             SDL_Delay(RandomNumberBetween(250, 2000 + (50 * simulated_loss)));
         }
 
-        int outcome;
+        NET_Status outcome;
         if (ShouldSimulateLoss(simulated_loss)) {
-            outcome = -1;
+            outcome = NET_FAILURE;
             addr->errstr = SDL_strdup("simulated failure");
         } else {
             outcome = ResolveAddress(addr);