Temporary fix for Mavericks: the skin shader isn't getting the color, so just

use white.  We're not using vertex colors on anything skinned yet, anyway.

interface/resources/shaders/skin_model.vert

@@ -32,7 +32,7 @@ void main(void) {
     normal = normalize(gl_ModelViewMatrix * normal);
     
     // pass along the vertex color
-    gl_FrontColor = gl_Color;
+    gl_FrontColor = vec4(1.0, 1.0, 1.0, 1.0);
     
     // and the texture coordinates
     gl_TexCoord[0] = gl_MultiTexCoord0;