core -> std on Mac

cgl.rs

@@ -10,7 +10,7 @@
 // Mac-specific OpenGL bindings.
 
 use gl2::{GLenum, GLint, GLsizei, GLuint};
-use core::libc::*;
+use std::libc::*;
 
 pub type CGLContextObj = *c_void;
 pub type CGLError = c_int;
@@ -50,4 +50,4 @@ extern {
     pub fn CGLTexImageIOSurface2D(ctx: CGLContextObj, target: GLenum, internal_format: GLenum,
                                   width: GLsizei, height: GLsizei, format: GLenum, ty: GLenum,
                                   ioSurface: IOSurfaceRef, plane: GLuint) -> CGLError;
-}
+}