Fixed regenerating the index file of a recording in case it is present, but empty

CONTRIBUTORS

@@ -3563,6 +3563,8 @@ Stefan Herdler <herdler@gmx.de>
  ".sort" file
  for reporting faulty memory handling in cString::Append()
  for adding failsafe defaults for 'make LCLBLD=1' to the Makefile
+ for reporting the index file of a recording not being regenerated in case it is
+ present, but empty
 
 Tobias Faust <tobias.faust@gmx.de>
  for the original "jumpingseconds" patch

HISTORY

@@ -9811,3 +9811,5 @@ Video Disk Recorder Revision History
   or above.
 - Added periodic calls to malloc_trim(0) to reduce memory consumption (thanks to
   Onur Sentürk).
+- Fixed regenerating the index file of a recording in case it is present, but empty
+  (reported by Stefan Herdler).

recording.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: recording.c 5.18 2022/11/22 14:33:48 kls Exp $
+ * $Id: recording.c 5.19 2022/11/28 14:39:23 kls Exp $
  */
 
 #include "recording.h"
@@ -2579,7 +2579,7 @@ cIndexFile::cIndexFile(const char *FileName, bool Record, bool IsPesRecording, b
               cCondWait::SleepMs(INDEXFILETESTINTERVAL);
         }
      int delta = 0;
-     if (!Record && access(fileName, R_OK) != 0) {
+     if (!Record && (access(fileName, R_OK) != 0 || FileSize(fileName) == 0)) {
         // Index file doesn't exist, so try to regenerate it:
         if (!isPesRecording) { // sorry, can only do this for TS recordings
            resumeFile.Delete(); // just in case