Fix Clang compilation.

non-const lvalue reference cannot bind to a temporary.

Change-Id: I561cc8cfcedace6aab949e6e496203f39af77e2e
Reviewed-on: https://swiftshader-review.googlesource.com/5594
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>
diff --git a/src/Shader/PixelProgram.cpp b/src/Shader/PixelProgram.cpp
index 2513edf..3048ad1 100644
--- a/src/Shader/PixelProgram.cpp
+++ b/src/Shader/PixelProgram.cpp
@@ -1124,12 +1124,14 @@
 
 	void PixelProgram::TEXELFETCH(Vector4f &dst, Vector4f &src0, const Src& src1, Vector4f &src2)
 	{
-		sampleTexture(dst, src1, src0.x, src0.y, src0.z, Float4(As<Int4>(src2.x)), src0, src0, src0, Lod, Fetch);
+		Float4 lod(As<Int4>(src2.x));
+		sampleTexture(dst, src1, src0.x, src0.y, src0.z, lod, src0, src0, src0, Lod, Fetch);
 	}
 
 	void PixelProgram::TEXELFETCH(Vector4f &dst, Vector4f &src0, const Src& src1, Vector4f &src2, Vector4f &offset)
 	{
-		sampleTexture(dst, src1, src0.x, src0.y, src0.z, Float4(As<Int4>(src2.x)), src0, src0, offset, Lod, Fetch | Offset);
+		Float4 lod(As<Int4>(src2.x));
+		sampleTexture(dst, src1, src0.x, src0.y, src0.z, lod, src0, src0, offset, Lod, Fetch | Offset);
 	}
 
 	void PixelProgram::TEXGRAD(Vector4f &dst, Vector4f &src0, const Src& src1, Vector4f &src2, Vector4f &src3)
diff --git a/src/Shader/VertexProgram.cpp b/src/Shader/VertexProgram.cpp
index 1aeb683..6d3f683 100644
--- a/src/Shader/VertexProgram.cpp
+++ b/src/Shader/VertexProgram.cpp
@@ -1555,12 +1555,14 @@
 
 	void VertexProgram::TEXELFETCH(Vector4f &dst, Vector4f &src0, const Src& src1, Vector4f &src2)
 	{
-		sampleTexture(dst, src1, src0.x, src0.y, src0.z, Float4(As<Int4>(src2.x)), src0, src0, src0, Lod, Fetch);
+		Float4 lod(As<Int4>(src2.x));
+		sampleTexture(dst, src1, src0.x, src0.y, src0.z, lod, src0, src0, src0, Lod, Fetch);
 	}
 
 	void VertexProgram::TEXELFETCH(Vector4f &dst, Vector4f &src0, const Src& src1, Vector4f &src2, Vector4f &offset)
 	{
-		sampleTexture(dst, src1, src0.x, src0.y, src0.z, Float4(As<Int4>(src2.x)), src0, src0, offset, Lod, Fetch | Offset);
+		Float4 lod(As<Int4>(src2.x));
+		sampleTexture(dst, src1, src0.x, src0.y, src0.z, lod, src0, src0, offset, Lod, Fetch | Offset);
 	}
 
 	void VertexProgram::TEXGRAD(Vector4f &dst, Vector4f &src0, const Src& src1, Vector4f &src2, Vector4f &src3)