msg_mime.c: explicit cast when assigning to mp_len
msg_mime.c: explicit cast when assigning to mp_len

Ignore-this: ca5b8291eb84d8b166ab7f659bcf69f8

darcs-hash:20090311165044-db55f-735c19eb79297b21d363b921bd87c9813f33736a.gz

xhook/sofia-sip,BelledonneCommunications/sofia-sip,xhook/sofia-sip,unispeech/sofia-sip,erdincay/sofia-sip,erdincay/sofia-sip,erdincay/sofia-sip,xhook/sofia-sip,xhook/sofia-sip,BelledonneCommunications/sofia-sip,jart/sofia-sip,jart/sofia-sip,unispeech/sofia-sip,BelledonneCommunications/sofia-sip,BelledonneCommunications/sofia-sip,unispeech/sofia-sip,xhook/sofia-sip,jart/sofia-sip,erdincay/sofia-sip,unispeech/sofia-sip