Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=54150

When the format is NULL vsnprintf() always returns -1 so we keep
doubling the allocated memory until running out of memory.

When they contain a percent character they would, at best, not be
printed correctly, and at worst cause a crash.

Reusing existing helper from user32 & comctl32.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=47888Signed-off-by: Eric Pouech <eric.pouech@gmail.com>

The patch does reduce error failures locally.

For the record:
- WM_PASTE in undo operations haven't been transformed (as it requires
  UNDO stack manipulation in a coherent way across platforms)

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=47888Signed-off-by: Eric Pouech <eric.pouech@gmail.com>

Signed-off-by: Eric Pouech <eric.pouech@gmail.com>

Signed-off-by: Eric Pouech <eric.pouech@gmail.com>

Signed-off-by: Eric Pouech <eric.pouech@gmail.com>

Signed-off-by: Eric Pouech <eric.pouech@gmail.com>

Signed-off-by: Eric Pouech <eric.pouech@gmail.com>

Signed-off-by: Eric Pouech <eric.pouech@gmail.com>

Signed-off-by: Eric Pouech <eric.pouech@gmail.com>

Signed-off-by: Eric Pouech <eric.pouech@gmail.com>

Signed-off-by: Eric Pouech <eric.pouech@gmail.com>

This feature will be available in version 1.11.

pcap_init() will be required by later patches and it was introduced after pcap_create().