ppc: signed/unsigned comparison

[BR]: https://sourceware.org/ml/binutils/2013-11/msg00064.html
(cherry picked from commit e2b5892e6e75109898db1cfbda2975fa422ba762)

gas/ChangeLog

 2013-11-15  Alan Modra  <amodra@gmail.com>
 
 	Apply changes from mainline to 2.24
+	2013-11-08  Jan-Benedict Glaw  <jbglaw@lug-owl.de
+	* config/tc-ppc.c (ppc_elf_localentry): Add cast.
+
 	2013-10-30  Ulrich Weigand  <uweigand@de.ibm.com>
 	* config/tc-ppc.c (md_pseudo_table): Add .localentry.
 	(ppc_elf_localentry): New function.

gas/config/tc-ppc.c

@@ -2269,7 +2269,7 @@ ppc_elf_localentry (int ignore ATTRIBUTE_UNUSED)
     {
       unsigned char encoded = PPC64_SET_LOCAL_ENTRY_OFFSET (exp.X_add_number);
 
-      if (exp.X_add_number != PPC64_LOCAL_ENTRY_OFFSET (encoded))
+      if (exp.X_add_number != (offsetT) PPC64_LOCAL_ENTRY_OFFSET (encoded))
         as_bad (_(".localentry expression for `%s' "
 		  "is not a valid power of 2"), S_GET_NAME (sym));
       else