ad-hoc patch to build mroonga on Mac OSX

gistfile1.diff

--- groonga-storage-engine-0.6/ha_mroonga.cc	2011-05-29 20:11:11.000000000 +0900
+++ groonga-storage-engine-0.6-fix/ha_mroonga.cc	2011-06-09 03:20:08.000000000 +0900
@@ -93,7 +93,7 @@
   if (mrn_logfile_opened) {
     pthread_mutex_lock(&mrn_log_mutex);
     fprintf(mrn_logfile, "%s|%c|%08x|%s\n", time,
-            *(slev + level), (uint)pthread_self(), msg);
+            *(slev + level), (uint)(unsigned long int)pthread_self(), msg);
     fflush(mrn_logfile);
     pthread_mutex_unlock(&mrn_log_mutex);
   }