UI: Set error mode to SEM_FAILCRITICALERRORS

This prevents spurious dialog boxes appearing, such as "No disk is in the
drive" if the application attempts to access an invalid drive.

UI/obs-app.cpp

@@ -1836,6 +1836,7 @@ int main(int argc, char *argv[])
 #endif
 
 #ifdef _WIN32
+	SetErrorMode(SEM_FAILCRITICALERRORS);
 	load_debug_privilege();
 	base_set_crash_handler(main_crash_handler, nullptr);
 #endif