Fixed an invalid lock sequence when trying to remove a deleted recording in case of low disk space; now making sure that AssertFreeDiskSpace() is called with the maximum timer priority in case there are several timers recording with different priorities

timers.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: timers.c 4.11 2017/06/25 10:02:09 kls Exp $
+ * $Id: timers.c 4.12 2017/10/31 09:41:31 kls Exp $
  */
 
 #include "timers.h"
@@ -804,6 +804,16 @@ const cTimer *cTimers::GetMatch(const cEvent *Event, eTimerMatch *Match) const
   return t;
 }
 
+int cTimers::GetMaxPriority(void) const
+{
+  int n = 0;
+  for (const cTimer *ti = First(); ti; ti = Next(ti)) {
+      if (!ti->Remote() && ti->Recording())
+         n = max(n, ti->Priority());
+      }
+  return n;
+}
+
 const cTimer *cTimers::GetNextActiveTimer(void) const
 {
   const cTimer *t0 = NULL;