Reverse dependency between SkScalar.h and SkFixed.h

src/core/SkFDot6.h

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkFDot6_DEFINED
 #define SkFDot6_DEFINED
 
+#include "SkFixed.h"
 #include "SkScalar.h"
 #include "SkMath.h"
 
 typedef int32_t SkFDot6;
 
 /* This uses the magic number approach suggested here:
  * http://stereopsis.com/sree/fpu2006.html and used in
  * _cairo_fixed_from_double. It does banker's rounding
  * (i.e. round to nearest even)
  */
@@ skipping 46 matching lines @@
     SkASSERT(b != 0);
 
     if (a == (int16_t)a) {
         return SkLeftShift(a, 16) / b;
     } else {
         return SkFixedDiv(a, b);
     }
 }
 
 #endif