wined3d: Compare interpolation mode VS compilation arguments.

dlls/wined3d/glsl_shader.c

@@ -8537,8 +8537,10 @@ static GLuint find_glsl_pshader(const struct wined3d_context *context,
 static inline BOOL vs_args_equal(const struct vs_compile_args *stored, const struct vs_compile_args *new,
         const DWORD use_map)
 {
-    if((stored->swizzle_map & use_map) != new->swizzle_map) return FALSE;
-    if((stored->clip_enabled) != new->clip_enabled) return FALSE;
+    if ((stored->swizzle_map & use_map) != new->swizzle_map)
+        return FALSE;
+    if ((stored->clip_enabled) != new->clip_enabled)
+        return FALSE;
     if (stored->point_size != new->point_size)
         return FALSE;
     if (stored->per_vertex_point_size != new->per_vertex_point_size)
@@ -8549,7 +8551,9 @@ static inline BOOL vs_args_equal(const struct vs_compile_args *stored, const str
         return FALSE;
     if (stored->next_shader_input_count != new->next_shader_input_count)
         return FALSE;
-    return stored->fog_src == new->fog_src;
+    if (stored->fog_src != new->fog_src)
+        return FALSE;
+    return !memcmp(stored->interpolation_mode, new->interpolation_mode, sizeof(new->interpolation_mode));
 }
 
 static GLuint find_glsl_vshader(const struct wined3d_context *context, struct shader_glsl_priv *priv,

dlls/wined3d/shader.c

@@ -3532,7 +3532,7 @@ void find_vs_compile_args(const struct wined3d_state *state, const struct wined3
             && state->render_states[WINED3D_RS_CLIPPLANEENABLE];
     args->point_size = state->gl_primitive_type == GL_POINTS;
     args->per_vertex_point_size = shader->reg_maps.point_size;
-    args->next_shader_type = hull_shader? WINED3D_SHADER_TYPE_HULL
+    args->next_shader_type = hull_shader ? WINED3D_SHADER_TYPE_HULL
             : geometry_shader ? WINED3D_SHADER_TYPE_GEOMETRY : WINED3D_SHADER_TYPE_PIXEL;
     if (shader->reg_maps.shader_version.major >= 4)
         args->next_shader_input_count = hull_shader ? hull_shader->limits->packed_input