"NULL !=" = NULL

src/effects/SkAvoidXfermode.cpp

 /*
  * 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.
  */
 
 #include "SkAvoidXfermode.h"
 #include "SkColorPriv.h"
 #include "SkReadBuffer.h"
@@ skipping 90 matching lines @@
         int d = color_dist32(dst[i], opR, opG, opB);
         // now reverse d if we need to
         d = MAX + (d ^ mask) - mask;
         SkASSERT((unsigned)d <= 255);
         d = Accurate255To256(d);
 
         d = scale_dist_14(d, mul, sub);
         SkASSERT(d <= 256);
 
         if (d > 0) {
-            if (NULL != aa) {
+            if (aa) {
                 d = SkAlphaMul(d, Accurate255To256(*aa++));
                 if (0 == d) {
                     continue;
                 }
             }
             dst[i] = SkFourByteInterp256(src[i], dst[i], d);
         }
     }
 }
 
@@ skipping 28 matching lines @@
         int d = color_dist16(dst[i], opR, opG, opB);
         // now reverse d if we need to
         d = MAX + (d ^ mask) - mask;
         SkASSERT((unsigned)d <= 31);
         // convert from 0..31 to 0..32
         d += d >> 4;
         d = scale_dist_14(d, mul, sub);
         SkASSERT(d <= 32);
 
         if (d > 0) {
-            if (NULL != aa) {
+            if (aa) {
                 d = SkAlphaMul(d, Accurate255To256(*aa++));
                 if (0 == d) {
                     continue;
                 }
             }
             dst[i] = SkBlend3216(src[i], dst[i], d);
         }
     }
 }
 
 void SkAvoidXfermode::xferA8(SkAlpha dst[], const SkPMColor src[], int count,
                              const SkAlpha aa[]) const {
     // override in subclass
 }
 
 #ifndef SK_IGNORE_TO_STRING
 void SkAvoidXfermode::toString(SkString* str) const {
     str->append("SkAvoidXfermode: opColor: ");
     str->appendHex(fOpColor);
     str->appendf("distMul: %d ", fDistMul);
 
     static const char* gModeStrings[] = { "Avoid", "Target" };
 
     str->appendf("mode: %s", gModeStrings[fMode]);
 }
 #endif