if SK_DEBUG -> ifdef SK_DEBUG

Should unbreak Chrome canary bots.

BUG=skia:
R=mtklein@google.com

Author: mtklein@chromium.org

Review URL: https://codereview.chromium.org/272623002

git-svn-id: http://skia.googlecode.com/svn/trunk@14616 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/pipe/SkGPipeWrite.cpp b/src/pipe/SkGPipeWrite.cpp
index 14caecd..a3e839a 100644
--- a/src/pipe/SkGPipeWrite.cpp
+++ b/src/pipe/SkGPipeWrite.cpp
@@ -29,7 +29,7 @@
 #include "SkTypeface.h"
 #include "SkWriter32.h"
 
-#if SK_DEBUG
+#ifdef SK_DEBUG
 // When debugging, allocate snuggly.
 static const size_t kMinBlockSize = 0;
 #else