fix edge shader input

source/blender/gpu/shaders/gpu_shader_edges_front_back_ortho_vert.glsl

@@ -11,7 +11,7 @@ uniform vec4 frontColor;
 uniform vec4 backColor;
 uniform vec4 silhouetteColor;
 
-uniform vec4 eye; // direction we are looking
+uniform vec3 eye; // direction we are looking
 
 uniform mat4 ModelViewProjectionMatrix;