Fix compiler error in SkTInternalList.h



git-svn-id: http://skia.googlecode.com/svn/trunk@6659 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/core/SkTInternalLList.h b/include/core/SkTInternalLList.h
index 78c82ba..a6b6f15 100644
--- a/include/core/SkTInternalLList.h
+++ b/include/core/SkTInternalLList.h
@@ -133,7 +133,7 @@
         } else {
             prev->fNext = newEntry;
         }
-#if SK_DEBUG
+#ifdef SK_DEBUG
         newEntry->fList = this;
 #endif
     }
@@ -162,7 +162,7 @@
         } else {
             next->fPrev = newEntry;
         }
-#if SK_DEBUG
+#ifdef SK_DEBUG
         newEntry->fList = this;
 #endif
     }