Au3Check warnings fix proposal

[mlipok]

according to
https://www.autoitscript.com/forum/topic/84133-winhttp-functions/?do=findComment&comment=1413029

[dragana-r]

Thanks, I've fixed valid warning. The rest not,

[maniootek]

The rest not? Why? There is only few lines to fix and people who use Au3Check will not struggle with your UDF.
I attached fixed one of your function (local variable declaration)
__WinHttpHTML5FormAttribs_fixed.txt

There is also one warning found:
Func __WinHttpFormUpload($hRequest, $sHeaders, $sData)

warning: $sHeaders: declared, but not used in func.