Ticket #638: Cleaned up compilation warning in jbuf.

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@2318 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjmedia/src/pjmedia/jbuf.c b/pjmedia/src/pjmedia/jbuf.c
index a27253e..f4ee52b 100644
--- a/pjmedia/src/pjmedia/jbuf.c
+++ b/pjmedia/src/pjmedia/jbuf.c
@@ -551,9 +551,6 @@
 	    if (jb->jb_status == JB_STATUS_PREFETCHING && 
 		jb->jb_prefetch_cnt >= jb->jb_prefetch)
 	    {
-		int diff, cur_size;
-
-		cur_size = jb_framelist_size(&jb->jb_framelist);
 		jb->jb_status = JB_STATUS_PROCESSING;
 	    }
 	}