go-gl/glfw — pull request #36 by sixthgear (2013-01-24 19:58:04+00:00)
Title: Changed argument name for MouseWheelHandler

Changed from "delta" to "pos" since the value reported by GLFW is not a delta, but rather a tracked position, and the distinction in godoc caused some confusion. See the reference manual for confirmation, section 3.4.13.

void GLFWCALL functionname( int pos );