Lots of small fixes/improvements

Spectate/scripting/Spectate.sp

@@ -4,6 +4,7 @@
 #include <sourcemod>
 #include <sdktools>
 #include <cstrike>
+#include <zombiereloaded>
 
 public Plugin myinfo =
 {
@@ -63,6 +64,25 @@ public Action Command_Spectate(int client, int argc)
 		return Plugin_Handled;
 	}
 
+	if (IsPlayerAlive(client) && ZR_IsClientZombie(client))
+	{
+		bool bOnlyZombie = true;
+		for (int i = 1; i <= MaxClients; i++)
+		{
+			if (i != client && IsClientInGame(i) && IsPlayerAlive(i) && ZR_IsClientZombie(i))
+			{
+				bOnlyZombie = false;
+				break;
+			}
+		}
+
+		if (bOnlyZombie)
+		{
+			PrintToChat(client, "[SM] Can not switch to spectate as the last zombie!");
+			return Plugin_Handled;
+		}
+	}
+
 	if (!argc)
 	{
 		if (GetClientTeam(client) != CS_TEAM_SPECTATOR)