svga: add assertions in svga_shader_type()

diff --git a/src/gallium/drivers/svga/svga_state_constants.c b/src/gallium/drivers/svga/svga_state_constants.c
index daf1024..6c3275e 100644 (file)
--- a/src/gallium/drivers/svga/svga_state_constants.c
+++ b/src/gallium/drivers/svga/svga_state_constants.c
@@ -40,9 +40,12 @@
 
 /* Convert from PIPE_SHADER_* to SVGA3D_SHADERTYPE_*
  */
-static int svga_shader_type( int unit )
+static int svga_shader_type( int shader )
 {
-   return unit + 1;
+   assert(PIPE_SHADER_VERTEX + 1 == SVGA3D_SHADERTYPE_VS);
+   assert(PIPE_SHADER_FRAGMENT + 1 == SVGA3D_SHADERTYPE_PS);
+   assert(shader <= PIPE_SHADER_FRAGMENT);
+   return shader + 1;
 }