re PR testsuite/79169 (g++.dg/warn/Wduplicated-branches1.C fails on powerpc…

re PR testsuite/79169 (g++.dg/warn/Wduplicated-branches1.C fails on powerpc since its introduction in r244705)

	PR testsuite/79169
	* g++.dg/warn/Wduplicated-branches1.C: Use signed char.

From-SVN: r244747

gcc/testsuite/ChangeLog

+2017-01-21  Marek Polacek  <polacek@redhat.com>
+
+	PR testsuite/79169
+	* g++.dg/warn/Wduplicated-branches1.C: Use signed char.
+
 2017-01-20  Jan Hubicka  <hubicka@ucw.cz>
 
 	* gcc.dg/tree-ssa/pr77445-2.c: Adjust template.

gcc/testsuite/g++.dg/warn/Wduplicated-branches1.C

@@ -4,7 +4,7 @@
 
 template <typename T>
 void
-f (char i, int *p)
+f (signed char i, int *p)
 {
   if (i)
     *p = (signed short) i;
@@ -17,5 +17,5 @@ f (char i, int *p)
     *p = (unsigned short) i;
 }
 
-template void f<unsigned short>(char, int *); // { dg-message "required from here" }
-template void f<signed short>(char, int *);
+template void f<unsigned short>(signed char, int *); // { dg-message "required from here" }
+template void f<signed short>(signed char, int *);