Update engine/system/win/sys_local.h

Fix Error C2440 'initializing': cannot convert from 'nullptr' to 'bool'

Co-authored-by: Fish013 <326399+Fish013@users.noreply.github.com>

Author: ppoelzl

engine/system/win/sys_local.h

@@ -60,6 +60,6 @@ class sys_main_c: public sys_IMain {
 	volatile bool	restartFlag = false;
 	char*	exitMsg = nullptr;
 	char*	threadError = nullptr;
-	bool	errorRaised = nullptr;
+	bool	errorRaised = false;
 	int		baseTime = 0;
 };