Dispose of VCL reference count if we drop parked sessions due to worker

pool shortages.

Fixes ticket #213


git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@2529 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/cache_pool.c

@@ -316,6 +316,13 @@ WRK_QueueSession(struct sess *sp)
 		UNLOCK(&tmtx);
 		sp->t_end = TIM_real();
 		vca_close_session(sp, "dropped");
+		if(sp->vcl != NULL) {
+			/*
+			 * A session parked on a busy object can come here
+			 * after it wakes up.  Loose the VCL reference.
+			 */
+			VCL_Rel(&sp->vcl);
+		}
 		SES_Delete(sp);
 		return;
 	}