-Wchar-subscripts should not warn for explicit signed char subscripts either. Another fix for PR4978.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@81780 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/warn-char-subscripts.c b/test/Sema/warn-char-subscripts.c
index 972393c..c6fd78c 100644
--- a/test/Sema/warn-char-subscripts.c
+++ b/test/Sema/warn-char-subscripts.c
@@ -33,7 +33,7 @@
 void t6() {
   int array[1] = { 0 };
   signed char subscript = 0;
-  int val = array[subscript]; // expected-warning{{array subscript is of type 'char'}}
+  int val = array[subscript]; // no warning for explicit signed char
 }
 
 void t7() {
@@ -53,7 +53,7 @@
 void t9() {
   int array[1] = { 0 };
   SignedCharTy subscript = 0;
-  int val = array[subscript]; // expected-warning{{array subscript is of type 'char'}}
+  int val = array[subscript]; // no warning for explicit signed char
 }
 
 typedef unsigned char UnsignedCharTy;