Test for proper handling of 8-bit characters in strings.

Reported by Per Hedbor <per@idonex.se>.

From-SVN: r32221

gcc/testsuite/gcc.c-torture/execute/20000227-1.c

+static const unsigned char f[] = "\0\377";
+static const unsigned char g[] = "\0";
+
+int main(void)
+{
+  if (sizeof f != 3 || sizeof g != 3)
+    abort ();
+  if (f[0] != g[0])
+    abort ();
+  if (f[1] != g[1])
+    abort ();
+  if (f[2] != g[2])
+    abort ();
+  return 0;
+}