[patch] testing/radix-tree: fix a macro expansion bug

[Dan Carpenter]

There are no parentheses around this macro and it causes a problem when
we do:

        index = rand() % THRASH_SIZE;

Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>

diff --git a/tools/testing/radix-tree/tag_check.c 
b/tools/testing/radix-tree/tag_check.c
index b7447ce..b0ac057 100644
--- a/tools/testing/radix-tree/tag_check.c
+++ b/tools/testing/radix-tree/tag_check.c
@@ -122,7 +122,7 @@ enum {
        NODE_TAGGED = 2,
 };
 
-#define THRASH_SIZE            1000 * 1000
+#define THRASH_SIZE            (1000 * 1000)
 #define N 127
 #define BATCH  33