[RCon]: Address rare crash (#834)

src/Components/Modules/NetworkDebug.cpp

@@ -35,6 +35,24 @@ namespace Components
 		Game::FS_FreeFile(file);
 	}
 
+	int NetworkDebug::I_stricmp_Stub(const char* s0, const char* s1)
+	{
+		assert(s0);
+		assert(s1);
+
+		if (!s0)
+		{
+			return -1;
+		}
+
+		if (!s1)
+		{
+			return 1;
+		}
+
+		return Utils::Hook::Call<int(const char*, const char*, int)>(0x426080)(s0, s1, std::numeric_limits<int>::max()); // I_strnicmp
+	}
+
 	NetworkDebug::NetworkDebug()
 	{
 #ifdef _DEBUG
@@ -42,6 +60,9 @@ namespace Components
 		Command::Add("parseBadPacket", CL_ParseBadPacket_f);
 #endif
 
+		// Address "race" condition where commands received from RCon can be null
+		Utils::Hook(0x6094DA, I_stricmp_Stub, HOOK_CALL).install()->quick(); // Cmd_ExecuteServerString
+
 		// Backport updates from IW5
 		Utils::Hook::Set<const char*>(0x45D112, "CL_PacketEvent - ignoring illegible message\n");
 	}

src/Components/Modules/NetworkDebug.hpp

@@ -11,5 +11,7 @@ namespace Components
 		static void CL_ParseServerMessage_Hk(Game::msg_t* msg);
 
 		static void CL_ParseBadPacket_f();
+
+		static int I_stricmp_Stub(const char* s0, const char* s1);
 	};
 }