Add USE_SSE Checks To Fix Compile on Linux (#677)

Fix 'Not SSE' build on RB-1.1 branch as documented by #617

Author: zicklag

src/core/Lut1DOp.cpp

@@ -189,6 +189,7 @@ OCIO_NAMESPACE_ENTER
             return simple_lut[clamp(index, 0.0f, maxIndex)];
         }
 
+#if !defined(USE_SSE) || defined(OCIO_UNIT_TEST)
         void Lut1D_Nearest(float* rgbaBuffer, long numPixels, const Lut1D & lut)
         {
             float maxIndex[3];
@@ -218,6 +219,8 @@ OCIO_NAMESPACE_ENTER
                 rgbaBuffer += 4;
             }
         }
+#endif
+
 #ifdef USE_SSE
         void Lut1D_Nearest_SSE(float* rgbaBuffer, long numPixels, const Lut1D & lut)
         {

src/core/MathUtils.cpp

@@ -330,11 +330,13 @@ OCIO_NAMESPACE_ENTER
     namespace
     {
 
+#if defined(OCIO_UNIT_TEST)
     void GetMxbResult(float* vout, float* m, float* x, float* v)
     {
         GetM44V4Product(vout, m, x);
         GetV4Sum(vout, vout, v);
     }
+#endif
 
     } // anon namespace