John Bowler 88b77cc6f3 [devel] Remove png_snprintf, add formatted warning messages. ...

This change adds internal APIs to allow png_warning messages to have parameters
 without requiring the host OS to implelment snprintf.  As a side effect the
 dependency of the RFC1132 code on stdio is removed and PNG_NO_WARNINGS does
 actually work now.

2011-05-05 06:49:55 -05:00

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