Prep for new warning.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@76613 91177308-0d34-0410-b5e6-96231b3b80d8

test/Analysis/exercise-ps.c

@@ -6,7 +6,7 @@
 // (i.e., no assertions or crashes).
 
 
-static const char * f1(const char *x, char *y) {
+static void f1(const char *x, char *y) {
   while (*x != 0) {
     *y++ = *x++;
   }