OpenCL header: clCreateCommandQueue misses 'var' for errcode_ret
<h3><details><summary>Original Reporter info from Mantis: <small>Erik Roessiger @erikroe</small></summary><small>
- **Reporter name:** Erik Rößiger
</small></details></h3>
## Description:
The 'cl' unit that serves as header for OpenCL misses the 'var' keyword for the parameter 'errcode_ret' in clCreateCommandQueue.<br/>
Line 689.
OpenCL documentation [ https://www.khronos.org/registry/OpenCL/sdk/1.1/docs/man/xhtml/clCreateCommandQueue.html ]defines 'errcode_ret' as pointer.
The attached patch adds 'var' and solves the issue.
## Mantis conversion info:
- **Mantis ID:** 32459
- **Version:** 3.1.1
issue