Pica/CommandProcessor: Add support for integer uniforms.

src/video_core/vertex_shader.cpp

@@ -30,6 +30,8 @@ static struct {
     Math::Vec4<float24> f[96];
 
     std::array<bool,16> b;
+
+    std::array<Math::Vec4<u8>,4> i;
 } shader_uniforms;
 
 // TODO: Not sure where the shader binary and swizzle patterns are supposed to be loaded to!
@@ -57,6 +59,11 @@ bool& GetBoolUniform(u32 index)
     return shader_uniforms.b[index];
 }
 
+Math::Vec4<u8>& GetIntUniform(u32 index)
+{
+    return shader_uniforms.i[index];
+}
+
 const std::array<u32, 1024>& GetShaderBinary()
 {
     return shader_memory;