Clear g_engine when an Engine is deleted. This avoids a crash in error()

when quitting Broken Sword II. (I still get the error message, of course,
but that's a lot more helpful than an SDL parachute.)

svn-id: r15535

1 files changed, 2 insertions, 0 deletions

diff --git a/base/engine.cpp b/base/engine.cpp
index dd066385f3..e1a1ca4207 100644
--- a/base/engine.cpp
+++ b/base/engine.cpp
@@ -54,6 +54,8 @@ Engine::~Engine() {
 
 	delete _mixer;
 	delete _saveFileMan;
+
+	g_engine = 0;
 }
 
 const char *Engine::getSavePath() const {