int vortex_frame_mime_header_count ( VortexMimeHeader header  ) 

Allows to get the number of times the MIME header was defined or the number of (times - 1) a call to vortex_frame_mime_header_next will succeed.

Parameters:
header The MIME header to check.
Returns:
The number of times the MIME header was found in the message. The function returns -1 if the reference received is NULL.