[PVR] Addon API: Changed type of PVR_TIMER.iEpgUid to unsigned int. I…

…ntroduce constant PVR_TIMER_NO_EPG_UID.

xbmc/addons/include/xbmc_pvr_types.h

@@ -103,6 +103,11 @@ extern "C" {
    */
   const unsigned int PVR_TIMER_NO_PARENT = PVR_TIMER_NO_CLIENT_INDEX; /*!< @brief timer has no parent; it was not scheduled by a repeating timer. */
 
+  /*!
+   * @brief special PVR_TIMER.iEpgUid value to indicate that a timer has no EPG event uid.
+   */
+  const unsigned int PVR_TIMER_NO_EPG_UID = 0; /*!< @brief timer has no EPG event uid. */
+
   /*!
    * @brief special PVR_TIMER.iClientChannelUid value to indicate "any channel". Useful for some repeating timer types.
    */
@@ -417,7 +422,7 @@ extern "C" {
     unsigned int    iWeekdays;                                 /*!< @brief (optional) week days, for repeating timers */
     unsigned int    iPreventDuplicateEpisodes;                 /*!< @brief (optional) 1 if backend should only record new episodes in case of a repeating epg-based timer, 0 if all episodes shall be recorded (no duplicate detection). Actual algorithm for
                                                                     duplicate detection is defined by the backend. Addons may define own values for different duplicate detection algorithms, thus this is not just a bool.*/
-    int             iEpgUid;                                   /*!< @brief (optional) epg event id. If set iClientChannelUid, strTitle, strSummary, startTime, endTime, iGenreType, iGenreSubType will be ignored */
+    unsigned int    iEpgUid;                                   /*!< @brief (optional) epg event id. Use PVR_TIMER_NO_EPG_UID to state that there is no EPG event id available for this timer. Values greater than PVR_TIMER_NO_EPG_UID represent a valid epg event id. */
     unsigned int    iMarginStart;                              /*!< @brief (optional) if set, the backend starts the recording iMarginStart minutes before startTime. */
     unsigned int    iMarginEnd;                                /*!< @brief (optional) if set, the backend ends the recording iMarginEnd minutes after endTime. */
     int             iGenreType;                                /*!< @brief (optional) genre type */