Make AA work also when FPS unlocking is disabled

Frame time calculations would not be properly initialized or updated
unless FPS unlocking was enabled. This would cause the minimum FPS
handling to keep anti-aliasing disabled all the time.

This change makes frame time calculations and anti-aliasing work wether
FPS unlocking is enabled or not.

FPS.cpp

@@ -187,11 +187,6 @@ void applyFPSPatch() {
 		return;
 	}
 
-	// Init counter for frame-rate calculations
-	lastRenderTime = 0.0f;
-	QueryPerformanceFrequency(&timerFreq);
-	QueryPerformanceCounter(&counterAtStart);
-
 	// Binary patches
 	//--------------------------------------------------------------
 	DWORD address;
@@ -208,3 +203,10 @@ void applyFPSPatch() {
 
 	SDLOG(0, "FPS unlocked\n");
 }
+
+void initFPSTimer() {
+	// Init counter for frame-rate calculations
+	lastRenderTime = 0.0f;
+	QueryPerformanceFrequency(&timerFreq);
+	QueryPerformanceCounter(&counterAtStart);
+}

FPS.h

@@ -3,6 +3,7 @@
 
 #pragma once
 
+void initFPSTimer();
 void applyFPSPatch();
 
 // returns time since startup in milliseconds

RenderstateManager.cpp

@@ -870,6 +870,6 @@ void RSManager::frameTimeManagement() {
 			SwitchToThread();
 			renderTime = getElapsedTime() - lastPresentTime;
 		}
-		lastPresentTime = getElapsedTime();
 	}
+	lastPresentTime = getElapsedTime();
 }

main.cpp

@@ -66,6 +66,7 @@ bool WINAPI DllMain(HMODULE hDll, DWORD dwReason, PVOID pvReserved) {
 
 		earlyDetour();
 
+		initFPSTimer();
 		if(Settings::get().getUnlockFPS()) applyFPSPatch();
 
 		return true;