mesa: add KHR_no_error support for glStencilMaskSeparate()

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

src/mapi/glapi/gen/gl_API.xml

@@ -5287,7 +5287,7 @@
         <glx ignore="true"/>
     </function>
 
-    <function name="StencilMaskSeparate" es2="2.0">
+    <function name="StencilMaskSeparate" es2="2.0" no_error="true">
         <param name="face" type="GLenum"/>
         <param name="mask" type="GLuint"/>
         <glx ignore="true"/>

src/mesa/main/stencil.c

@@ -526,6 +526,14 @@ stencil_mask_separate(struct gl_context *ctx, GLenum face, GLuint mask)
 
 
 /* OpenGL 2.0 */
+void GLAPIENTRY
+_mesa_StencilMaskSeparate_no_error(GLenum face, GLuint mask)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   stencil_mask_separate(ctx, face, mask);
+}
+
+
 void GLAPIENTRY
 _mesa_StencilMaskSeparate(GLenum face, GLuint mask)
 {

src/mesa/main/stencil.h

@@ -72,6 +72,9 @@ _mesa_StencilFuncSeparate(GLenum face, GLenum func, GLint ref, GLuint mask);
 extern void GLAPIENTRY
 _mesa_StencilFuncSeparateATI(GLenum frontfunc, GLenum backfunc, GLint ref, GLuint mask);
 
+void GLAPIENTRY
+_mesa_StencilMaskSeparate_no_error(GLenum face, GLuint mask);
+
 extern void GLAPIENTRY
 _mesa_StencilMaskSeparate(GLenum face, GLuint mask);