Fix typo in non-SIMD Sk4f::thenElse().

src/core/SkNx.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkNx_DEFINED
 #define SkNx_DEFINED
 
@@ skipping 123 matching lines @@
     SkNf approxInvert() const { return SkNf(fLo.approxInvert(), fHi.approxInvert()); }
 
     template <int k> T kth() const {
         SkASSERT(0 <= k && k < N);
         return k < N/2 ? fLo.template kth<k>() : fHi.template kth<k-N/2>();
     }
 
     bool allTrue() const { return fLo.allTrue() && fHi.allTrue(); }
     bool anyTrue() const { return fLo.anyTrue() || fHi.anyTrue(); }
     SkNf thenElse(const SkNf& t, const SkNf& e) const {
-        return SkNf(fLo.thenElse(t.fLo, t.fHi), fHi.thenElse(t.fLo, t.fHi));
+        return SkNf(fLo.thenElse(t.fLo, e.fLo), fHi.thenElse(t.fHi, e.fHi));
     }
 
 protected:
     REQUIRE(0 == (N & (N-1)));
     SkNf(const SkNf<N/2, T>& lo, const SkNf<N/2, T>& hi) : fLo(lo), fHi(hi) {}
 
     SkNf<N/2, T> fLo, fHi;
 };
 
 
@@ skipping 121 matching lines @@
 typedef SkNi<4,  uint16_t> Sk4h;
 typedef SkNi<8,  uint16_t> Sk8h;
 typedef SkNi<16, uint16_t> Sk16h;
 
 typedef SkNi<16, uint8_t> Sk16b;
 
 typedef SkNi<4,  int32_t> Sk4i;
 typedef SkNi<4, uint32_t> Sk4u;
 
 #endif//SkNx_DEFINED