Description:
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In HEAD (rev 1.21) of uploadprogress.c, in uploadprogress_file_php_get_info(), it seems that one of the whitespace-skip loops is incrementing the wrong pointer variable.

Reproduce code:
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Lines 402-403:
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/* trim spaces in front of the name/value */
while (*k && *k <= 32) v++;
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Should be:
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/* trim spaces in front of the name/value */
while (*k && *k <= 32) k++;
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Expected result:
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Whitespace at the beginning of each key and value gets skipped/ignored.

Actual result:
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If the key contains leading whitespace, a possibility for an infinite loop exists.