Improve test case.

llvm-svn: 59902
diff --git a/clang/test/Analysis/array-struct.c b/clang/test/Analysis/array-struct.c
index 1045bdb..914d6e2 100644
--- a/clang/test/Analysis/array-struct.c
+++ b/clang/test/Analysis/array-struct.c
@@ -62,7 +62,7 @@
 
 void f8() {
   int a[10];
-  a[sizeof(a) - 1] = 1;
+  a[sizeof(a)/sizeof(int) - 1] = 1;
 }
 
 void f9() {