Fix/prevent crashes when MainWindow is closed before LoadFile() completes, or when it gets certain messages before TheThread completes initialization.

Fix missing ppsspp.ini loading log (only 1 unimportant line though).
Fix loading ui_atlas.zim failure when [General]Browse = True is set in ppsspp.ini.
Some other minor fixes as well.

Windows/EmuThread.h

@@ -1,4 +1,22 @@
+// Copyright (c) 2013- PPSSPP Project.
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, version 2.0 or later versions.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License 2.0 for more details.
+
+// A copy of the GPL 2.0 should have been included with the program.
+// If not, see http://www.gnu.org/licenses/
+
+// Official git repository and contact information can be found at
+// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
+
 #pragma once
 
 void EmuThread_Start();
-void EmuThread_Stop();
+void EmuThread_Stop();
+bool EmuThread_Ready();