debug: fix inverted logic in fio_did_warn()

Fixes: 5ec3bc5401f3 ("init: add global 'warned' state")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/debug.h b/debug.h
index a2b6fa6..ba62214 100644
--- a/debug.h
+++ b/debug.h
@@ -31,11 +31,10 @@
 
 static inline bool fio_did_warn(unsigned int mask)
 {
-	if (!(*fio_warned & mask)) {
-		*fio_warned |= mask;
+	if (*fio_warned & mask)
 		return true;
-	}
 
+	*fio_warned |= mask;
 	return false;
 }