Fixed '#if with no expression' warning/error



git-svn-id: http://skia.googlecode.com/svn/trunk@7840 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/lazy/SkLruImageCache.cpp b/src/lazy/SkLruImageCache.cpp
index 0f04716..62e2953 100644
--- a/src/lazy/SkLruImageCache.cpp
+++ b/src/lazy/SkLruImageCache.cpp
@@ -62,13 +62,13 @@
     while (pixels != NULL) {
         CachedPixels* prev = iter.prev();
         SkASSERT(!pixels->isLocked());
-#if SK_DEBUG
+#ifdef SK_DEBUG
         fRamUsed -= pixels->getLength();
 #endif
         SkDELETE(pixels);
         pixels = prev;
     }
-#if SK_DEBUG
+#ifdef SK_DEBUG
     SkASSERT(fRamUsed == 0);
 #endif
 }