Silence clang warnings about uninitialised and unused values in
memcheck testcases.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13599 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/memcheck/tests/mempool2.c b/memcheck/tests/mempool2.c
index 256ff05..8fa3d5c 100644
--- a/memcheck/tests/mempool2.c
+++ b/memcheck/tests/mempool2.c
@@ -49,7 +49,7 @@
 
    p->size = p->left = SUPERBLOCK_SIZE;
    p->levels = NULL;
-   VALGRIND_MAKE_MEM_NOACCESS(p->where, SUPERBLOCK_SIZE);
+   (void) VALGRIND_MAKE_MEM_NOACCESS(p->where, SUPERBLOCK_SIZE);
    return p;
 }
 
@@ -75,7 +75,7 @@
    level_list *l = p->levels;
    p->levels = l->next;
    VALGRIND_DESTROY_MEMPOOL(l->where);
-   VALGRIND_MAKE_MEM_NOACCESS(l->where, p->where-l->where);
+   (void) VALGRIND_MAKE_MEM_NOACCESS(l->where, p->where-l->where);
    p->where = l->where;
    if (use_mmap)
       munmap(l, sizeof(level_list));