fix a syntax error in the non-glsl13 case

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@10940 d7cf8633-e32d-0410-b094-e92efae38249
::stable-branch::merge=3b3882e33353f5313b1f64df297ba0f7ce06bf34

diff --git a/shader_glsl.h b/shader_glsl.h
index 515556aebe6b8e8f73b4222ccf9fdfcc3ab34ee3..d8513c5dcb6f3b3805f9d279b7ef217837d3a62c 100644 (file)
--- a/shader_glsl.h
+++ b/shader_glsl.h
@@ -31,8 +31,8 @@
 "# endif\n"
 "# define dp_varying varying\n"
 "# define dp_attribute attribute\n"
-"# define dp_offsetmapping_dFdx(a) 0\n"
-"# define dp_offsetmapping_dFdy(a) 0\n"
+"# define dp_offsetmapping_dFdx(a) vec2(0.0, 0.0)\n"
+"# define dp_offsetmapping_dFdy(a) vec2(0.0, 0.0)\n"
 "# define dp_textureGrad(a,b,c,d) texture2D(a,b)\n"
 "# define dp_texture2D texture2D\n"
 "# define dp_texture3D texture3D\n"