Compiler warnings


git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.2.x@758 632fc199-4ca6-4c93-a231-07263d6284db
diff --git a/jcdctmgr.c b/jcdctmgr.c
index 711f9da..12f8872 100644
--- a/jcdctmgr.c
+++ b/jcdctmgr.c
@@ -182,7 +182,7 @@
     /* fq will be one bit too large to fit in DCTELEM, so adjust */
     fq >>= 1;
     r--;
-  } else if (fr <= (divisor / 2)) { /* fractional part is < 0.5 */
+  } else if (fr <= (divisor / 2U)) { /* fractional part is < 0.5 */
     c++;
   } else { /* fractional part is > 0.5 */
     fq++;