cstrike: Fix wrong timeleft calculation (#1072)

* Fix wrong timeleft calculation

* reorder function calls

Author: BotoX

extensions/cstrike/extension.cpp

@@ -51,6 +51,7 @@ IGameConfig *g_pGameConf = NULL;
 IGameEventManager2 *gameevents = NULL;
 bool hooked_everything = false;
 int g_msgHintText = -1;
+CGlobalVars *gpGlobals;
 
 SMEXT_LINK(&g_CStrike);
 
@@ -107,6 +108,7 @@ bool CStrike::SDK_OnMetamodLoad(ISmmAPI *ismm, char *error, size_t maxlen, bool
 {
 	GET_V_IFACE_CURRENT(GetEngineFactory, gameevents, IGameEventManager2, INTERFACEVERSION_GAMEEVENTSMANAGER2);
 	GET_V_IFACE_CURRENT(GetEngineFactory, engine, IVEngineServer, INTERFACEVERSION_VENGINESERVER);
+	gpGlobals = ismm->GetCGlobals();
 
 	return true;
 }

extensions/cstrike/extension.h

@@ -166,6 +166,7 @@ class CStrike :
 extern IBinTools *g_pBinTools;
 extern IGameConfig *g_pGameConf;
 extern ISDKTools *g_pSDKTools;
+extern CGlobalVars *gpGlobals;
 extern int g_msgHintText;
 extern bool g_pIgnoreTerminateDetour;
 extern bool g_pIgnoreCSWeaponDropDetour;

extensions/cstrike/timeleft.cpp

@@ -58,7 +58,19 @@ void TimeLeftEvents::FireGameEvent(IGameEvent *event)
 		if (get_new_timeleft_offset || !round_end_found)
 		{
 			get_new_timeleft_offset = false;
-			timersys->NotifyOfGameStart();
+
+			float flGameStartTime = gpGlobals->curtime;
+			uintptr_t gamerules = (uintptr_t)g_pSDKTools->GetGameRules();
+			if (gamerules)
+			{
+				sm_sendprop_info_t info;
+				if (gamehelpers->FindSendPropInfo("CCSGameRulesProxy", "m_flGameStartTime", &info))
+				{
+					flGameStartTime = *(float *)(gamerules + info.actual_offset);
+				}
+			}
+
+			timersys->NotifyOfGameStart(flGameStartTime - gpGlobals->curtime);
 			timersys->MapTimeLeftChanged();
 		}
 		round_end_found = false;