Minor fix for log2

No behavior is modified in this cl. log2() was calling logarithm2()
with the wrong options, but logarithm2() currently ignores all
options, so this had no consequence. Fixing to prevent future errors.

Change-Id: I6518d9d90fc1f34cadab2de12657064b2510b463
Reviewed-on: https://swiftshader-review.googlesource.com/10429
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
diff --git a/src/Shader/ShaderCore.cpp b/src/Shader/ShaderCore.cpp
index 424636b..5799d3f 100644
--- a/src/Shader/ShaderCore.cpp
+++ b/src/Shader/ShaderCore.cpp
@@ -978,10 +978,10 @@
 
 	void ShaderCore::log2(Vector4f &dst, const Vector4f &src, bool pp)
 	{
-		dst.x = logarithm2(src.x, pp);
-		dst.y = logarithm2(src.y, pp);
-		dst.z = logarithm2(src.z, pp);
-		dst.w = logarithm2(src.w, pp);
+		dst.x = logarithm2(src.x, false, pp);
+		dst.y = logarithm2(src.y, false, pp);
+		dst.z = logarithm2(src.z, false, pp);
+		dst.w = logarithm2(src.w, false, pp);
 	}
 
 	void ShaderCore::log(Vector4f &dst, const Vector4f &src, bool pp)