Fix bug in dstThreadedTimeout class
Fix bug in dstThreadedTimeout class

Fix bug in dstThreadedTimeout class (dstTimer.h) by adding a mutex.

Signed-off-by: Harm Hanemaaijer <2f9537c6ec687a8748c4f2e7dccd545b87138ca3@yahoo.com>

hglm/DataSetTurbo,hglm/DataSetTurbo