Merge pull request #9 from miconda/master

Fixed errors reported by clang under MacOSX

 * fixed compilation on BSD - Mac OS X
 * proper size for arrays not to exceed the limits by writing last position with NULL
 * fix compile warning for implicit declaration of function 'save_raw_set_group'
Call list can be cleared by pressing F5
Fixed Color indicator in Call Flow window title
Fix payload memory free when detroying messages
Implement option to set a capture limit

When capturing online, by default, sngrep will stop capturing after 200 dialogs
has been detected.

This can be changes using the sngreprc file.
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  Implement option to set a capture limit
  Fix payload memory free when detroying messages
  Fixed Color indicator in Call Flow window title
  Call list can be cleared by pressing F5