[NFC][sanitizer] Fix "not used" warning in test

GitOrigin-RevId: ae234a7545db8b73297f56508d95a4f85cfd7c1f
diff --git a/lib/sanitizer_common/tests/sanitizer_common_test.cpp b/lib/sanitizer_common/tests/sanitizer_common_test.cpp
index c76644f..8e7be95 100644
--- a/lib/sanitizer_common/tests/sanitizer_common_test.cpp
+++ b/lib/sanitizer_common/tests/sanitizer_common_test.cpp
@@ -100,6 +100,7 @@
 
   MprotectNoAccess(reinterpret_cast<uptr>(mem), PageSize);
   volatile u8 t;
+  (void)t;
   EXPECT_DEATH(t = mem[0], "");
   EXPECT_DEATH(t = mem[PageSize / 2], "");
   EXPECT_DEATH(t = mem[PageSize - 1], "");