fix trivial matrix computation

tests/UtilsTest.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "Test.h"
 #include "SkRandom.h"
 #include "SkRefCnt.h"
@@ skipping 53 matching lines @@
         tmp[0] = &obj0;
         tmp[1] = &obj1;
         REPORTER_ASSERT(reporter, 2 == obj0.getRefCnt());
         REPORTER_ASSERT(reporter, 2 == obj1.getRefCnt());
 
         // test out reset with data in the array (and a new allocation)
         tmp.reset(0);
         REPORTER_ASSERT(reporter, 0 == tmp.count());
         REPORTER_ASSERT(reporter, 1 == obj0.getRefCnt());
         REPORTER_ASSERT(reporter, 1 == obj1.getRefCnt());
-        
+
         tmp.reset(2);   // this should use the preexisting allocation
         REPORTER_ASSERT(reporter, 2 == tmp.count());
         tmp[0] = &obj0;
         tmp[1] = &obj1;
     }
 
     // test out destructor with data in the array (and using existing allocation)
     REPORTER_ASSERT(reporter, 1 == obj0.getRefCnt());
     REPORTER_ASSERT(reporter, 1 == obj1.getRefCnt());
 
@@ skipping 132 matching lines @@
     }
 
     test_utf16(reporter);
     test_search(reporter);
     test_autounref(reporter);
     test_autostarray(reporter);
 }
 
 #include "TestClassDef.h"
 DEFINE_TESTCLASS("Utils", UtfTestClass, TestUTF)