glsl: Fix typo in builtin step() using a wrong channel.

diff --git a/src/glsl/builtins/ir/step b/src/glsl/builtins/ir/step
index 5627241176f9c3c0b336e76ba93d839cfbca073d..7aec9d7a6cc62f3cc5ff35bf1d7a5a1758ad9ca2 100644 (file)
--- a/src/glsl/builtins/ir/step
+++ b/src/glsl/builtins/ir/step
@@ -61,7 +61,7 @@
      ((declare () vec4 t)
       (assign (constant bool (1)) (x) (var_ref t) (expression float b2f (expression bool >= (swiz x (var_ref x))(swiz x (var_ref edge)))))
       (assign (constant bool (1)) (y) (var_ref t) (expression float b2f (expression bool >= (swiz y (var_ref x))(swiz y (var_ref edge)))))
-      (assign (constant bool (1)) (z) (var_ref t) (expression float b2f (expression bool >= (swiz y (var_ref x))(swiz z (var_ref edge)))))
+      (assign (constant bool (1)) (z) (var_ref t) (expression float b2f (expression bool >= (swiz z (var_ref x))(swiz z (var_ref edge)))))
       (assign (constant bool (1)) (w) (var_ref t) (expression float b2f (expression bool >= (swiz w (var_ref x))(swiz w (var_ref edge)))))
       (return (var_ref t))))
 ))