Handled failure to release a mutex lock. Coverity CID 28698.

xorriso/drive_mgt.c

@@ -2394,7 +2394,7 @@ struct xorriso_md5_state {
 int Xorriso__add_spot(struct xorriso_md5_state *state,
                       int start_lba, int blocks, int quality, int flag)
 {
- int ret;
+ int ret, uret;
 
  if(state->chunk != NULL) {
    ret= pthread_mutex_lock(&(state->spot_mutex));
@@ -2402,8 +2402,11 @@ int Xorriso__add_spot(struct xorriso_md5_state *state,
      return(0);
  }
  ret= Spotlist_add_item(state->spotlist, start_lba, blocks, quality, 0);
- if(state->chunk != NULL)
-   pthread_mutex_unlock(&(state->spot_mutex));
+ if(state->chunk != NULL) {
+   uret= pthread_mutex_unlock(&(state->spot_mutex));
+   if(uret != 0 && ret > 0)
+     ret= 0;
+ }
  return(ret);
 }
 

xorriso/xorriso_timestamp.h

@@ -1 +1 @@
-#define Xorriso_timestamP "2015.11.13.152751"
+#define Xorriso_timestamP "2015.11.13.202241"