glsl: Fix the setup of refract()'s output for vec3/vec4 and k < 0.0.
caught by valgrind.
diff --git a/src/glsl/builtin_function.cpp b/src/glsl/builtin_function.cpp
index 40c85e7..5b3b49d 100644
--- a/src/glsl/builtin_function.cpp
+++ b/src/glsl/builtin_function.cpp
@@ -1808,7 +1808,7 @@
" (expression float dot (var_ref n) (var_ref i))\n"
" (expression float dot (var_ref n) (var_ref i))))))))\n"
" (if (expression bool < (var_ref k) (constant float (0.0)))\n"
- " ((return (constant vec3 (0.0 0.0))))\n"
+ " ((return (constant vec3 (0.0 0.0 0.0))))\n"
" ((return (expression vec3 -\n"
" (expression vec3 * (var_ref eta) (var_ref i))\n"
" (expression vec3 *\n"
@@ -1833,7 +1833,7 @@
" (expression float dot (var_ref n) (var_ref i))\n"
" (expression float dot (var_ref n) (var_ref i))))))))\n"
" (if (expression bool < (var_ref k) (constant float (0.0)))\n"
- " ((return (constant vec4 (0.0 0.0))))\n"
+ " ((return (constant vec4 (0.0 0.0 0.0 0.0))))\n"
" ((return (expression vec4 -\n"
" (expression vec4 * (var_ref eta) (var_ref i))\n"
" (expression vec4 *\n"