Description of Problem:
kernel/qpngio.cpp: In member function `bool 
QPNGImageWriter::writeImage(const
   QImage&, int, int, int)':
kernel/qpngio.cpp:395: warning: argument `int quality' might be clobbered 
by
   `longjmp' or `vfork'
kernel/qpngio.cpp:395: warning: argument `int off_x' might be clobbered by
   `longjmp' or `vfork'
kernel/qpngio.cpp:395: warning: argument `int off_y' might be clobbered by
   `longjmp' or `vfork'

The code causing these warnings is:
394 bool QPNGImageWriter::writeImage(const QImage& image, int quality, 
int off_x, int off_y)
395 {

The method doesn't do anything odd with these variables; unless I'm 
completely mistaken, the warnings appear to be bogus.

Version-Release number of selected component (if applicable):
3.1-0.10

How Reproducible:
100%

Steps to Reproduce:
1. Try to build Qt 3.0.1