refs #4871 fix lc_create so it doesn't issue useless valgrind warnings

git-svn-id: file:///svn/toku/tokudb@45207 c7de825b-a66e-492c-adef-691d508d4ae1

ft/logcursor.c

@@ -140,6 +140,7 @@ static int lc_create(TOKULOGCURSOR *lc, const char *log_dir) {
     }
     cursor->logfiles = NULL;
     cursor->n_logfiles = 0;
+    cursor->cur_fp = NULL;
     cursor->cur_lsn.lsn=0;
     cursor->last_direction=LC_FIRST;