Multisampling value of 1

Setting a multisampling values of 0 or 1 are apparently
2 different cases, so I tried removing the even number
check to fix this. It didn't break any tests, but I'm
not sure how well this is covered by the tests.

Change-Id: I0e7de9b153288f0c07bde9a2f104ea1d2bf230ac
Reviewed-on: https://swiftshader-review.googlesource.com/3622
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

src/OpenGL/libGL/Context.cpp

diff --git a/src/OpenGL/libGL/Context.cpp b/src/OpenGL/libGL/Context.cpp
index 8a3847e..0285baa 100644
--- a/src/OpenGL/libGL/Context.cpp
+++ b/src/OpenGL/libGL/Context.cpp
@@ -1414,7 +1414,7 @@
                     }

                     break;

                 case GL_SAMPLES:

-                    *params = samples & ~1;

+                    *params = samples;

                     break;

                 }

             }

@@ -2687,14 +2687,14 @@
 

 int Context::getSupportedMultiSampleDepth(sw::Format format, int requested)

 {

-    if(requested <= 1)

+    if(requested <= 0)

     {

-        return 1;

+        return 0;

     }

 	

-	if(requested == 2)

+	if(requested <= 2)

 	{

-		return 2;

+		return requested;

 	}

 	

 	return 4;

src/OpenGL/libGL/Renderbuffer.cpp

diff --git a/src/OpenGL/libGL/Renderbuffer.cpp b/src/OpenGL/libGL/Renderbuffer.cpp
index 95887b5..458a69f 100644
--- a/src/OpenGL/libGL/Renderbuffer.cpp
+++ b/src/OpenGL/libGL/Renderbuffer.cpp
@@ -358,7 +358,7 @@
 	mHeight = height;
 	this->format = format;
 	internalFormat = requestedFormat;
-	mSamples = supportedSamples & ~1;
+	mSamples = supportedSamples;
 }
 
 Colorbuffer::~Colorbuffer()
@@ -418,7 +418,7 @@
 	mHeight = height;
 	format = GL_DEPTH24_STENCIL8_EXT;
 	internalFormat = sw::FORMAT_D24S8;
-	mSamples = supportedSamples & ~1;
+	mSamples = supportedSamples;
 }
 
 DepthStencilbuffer::~DepthStencilbuffer()