General: Move some code around.

Move the 'human' code back to its original location, and call the
infection function instead when they should be infected, instead of
doing it forcefully. That caused issues whenever there was a situation
of a warmup round ect. blocking infections.

src/zr/infect.inc

@@ -278,6 +278,13 @@ InfectOnClientSpawn(client)
     // Disable zombie flag on client.
     g_bZombie[client] = false;
 
+    // Check if client is spawning on the terrorists team.
+    if (ZRIsClientOnTeam(client, CS_TEAM_T) && InfectHasZombieSpawned())
+    {
+        CS_SwitchTeam(client, CS_TEAM_CT);
+        CS_RespawnPlayer(client);
+    }
+
     InfectUnglitchKevlar(client);
 
     // Forward event to modules.