fix #if to #ifdef for SK_DEBUG

src/core/SkRecordDraw.cpp

Index: src/core/SkRecordDraw.cpp
diff --git a/src/core/SkRecordDraw.cpp b/src/core/SkRecordDraw.cpp
index 613c2c0dd4e759fff874a54a1e08ca8e357e3b3a..a1c148a547e8d5e66a54f46b0ff04f5c2fa79b38 100644
--- a/src/core/SkRecordDraw.cpp
+++ b/src/core/SkRecordDraw.cpp
@@ -312,13 +312,13 @@ private:
     }
 
     static void AdjustTextForFontMetrics(SkRect* rect, const SkPaint& paint) {
-#if SK_DEBUG
+#ifdef SK_DEBUG
         SkRect correct = *rect;
 #endif
         const SkScalar yPad = 1.5f * paint.getTextSize(),  // In practice, this seems to be enough.
                        xPad = 4.0f * yPad;                 // Hack for very wide Github logo font.
         rect->outset(xPad, yPad);
-#if SK_DEBUG
+#ifdef SK_DEBUG
         SkPaint::FontMetrics metrics;
         paint.getFontMetrics(&metrics);
         correct.fLeft   += metrics.fXMin;