guard references to SkColorTable

Bug: skia:6828
Change-Id: I0c8c78e70b118f51cb59dc45675e4ddcd4776108
Reviewed-on: https://skia-review.googlesource.com/24260
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Leon Scroggins <scroggo@google.com>
diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index 05b3f1a..dab5be4 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -2974,8 +2974,7 @@
 
 static bool install(SkBitmap* bm, const SkImageInfo& info,
                     const SkRasterHandleAllocator::Rec& rec) {
-    return bm->installPixels(info, rec.fPixels, rec.fRowBytes, nullptr,
-                             rec.fReleaseProc, rec.fReleaseCtx);
+    return bm->installPixels(info, rec.fPixels, rec.fRowBytes, rec.fReleaseProc, rec.fReleaseCtx);
 }
 
 SkRasterHandleAllocator::Handle SkRasterHandleAllocator::allocBitmap(const SkImageInfo& info,