glsl: Fix incorrect assertion

This assertion was added in commit f1c1ee11, but it did not notice
that the array is accessed with 'size-1' instead of 'size'.  As a
result, the assertion was off by one.  This caused failures in at
least glsl-orangebook-ch06-bump.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/mesa/program/ir_to_mesa.cpp b/src/mesa/program/ir_to_mesa.cpp
index be162e7a25..da0d8106df 100644
--- a/src/mesa/program/ir_to_mesa.cpp
+++ b/src/mesa/program/ir_to_mesa.cpp
@@ -311,7 +311,7 @@ swizzle_for_size(int size)
       MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_W),
    };
 
-   assert(size < 4);
+   assert((size >= 1) && (size <= 4));
    return size_swizzles[size - 1];
 }