New added pthread feature leads to some deadlock with some unlock code missing.
This patch fix it.

Signed-off-by: Zhai Edwin <edwin.zhai@intel.com>

Upstream-Status: Pending

Index: libical-0.47/src/libical/icaltimezone.c
===================================================================
--- libical-0.47.orig/src/libical/icaltimezone.c	2011-12-16 13:42:25.000000000 +0800
+++ libical-0.47/src/libical/icaltimezone.c	2011-12-16 14:16:25.000000000 +0800
@@ -1773,7 +1773,7 @@
     filename = (char*) malloc (filename_len);
     if (!filename) {
 	icalerror_set_errno(ICAL_NEWFAILED_ERROR);
-	return;
+	goto out;
     }
 
     snprintf (filename, filename_len, "%s/%s.ics", get_zone_directory(),
@@ -1783,7 +1783,7 @@
     free (filename);
     if (!fp) {
 	icalerror_set_errno(ICAL_FILE_ERROR);
-	return;
+	goto out;
     }
 
 	
@@ -1807,7 +1807,7 @@
 
     if (!subcomp) {
 	icalerror_set_errno(ICAL_PARSE_ERROR);
-	return;
+	goto out;
     }
 
     icaltimezone_get_vtimezone_properties (zone, subcomp);
@@ -1817,10 +1817,12 @@
     icalcomponent_free(comp);
     }
 #endif 
-#ifdef HAVE_PTHREAD
+
  out:
+#ifdef HAVE_PTHREAD
     pthread_mutex_unlock(&builtin_mutex);
 #endif
+    return;
 }