[lsan] This time really fix Win build.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@184556 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/lsan/lsan_common.cc b/lib/lsan/lsan_common.cc
index 341673f..a7578f2 100644
--- a/lib/lsan/lsan_common.cc
+++ b/lib/lsan/lsan_common.cc
@@ -403,7 +403,7 @@
 #endif  // CAN_SANITIZE_LEAKS
 
 bool DisabledInThisThread() {
-#ifdef CAN_SANITIZE_LEAKS
+#if CAN_SANITIZE_LEAKS
   return disable_counter > 0;
 #endif
   return false;