Merge branch 'crashlog_improvements' into jgrpp

# Conflicts:
#	source.list
#	src/openttd.cpp
#	src/stdafx.h
#	src/vehicle.cpp

src/thread/thread_none.cpp

@@ -33,3 +33,7 @@ public:
 {
 	return new ThreadMutex_None();
 }
+
+void SetSelfAsMainThread() { }
+
+bool IsMainThread() { return true; }