zephyr_tzc_escape_msg and zephyr_tzc_deescape_str refactoring
* Move declarations before implementations. Also slightly change `local_zephyr_normalize` signature
* Early return from functions
* Get `strlen(message)` once
* Convert `while` to `for`
* Simplify escaping
* Remove nulling of last char since `newmsg` already initialized to 0's
Testing Done:
Compile.
Reviewed at https://reviews.imfreedom.org/r/434/
# UPDATING VERSION NUMBERS FOR RELEASES
#
# The version number is:
# <major>.<minor>.<micro><extra>
#
# micro += 1
#
# If any functions have been added to libpurple, Pidgin, or Finch:
# micro = 0
# minor += 1
#
# If backwards compatibility has been broken in libpurple, Pidgin, or Finch:
# micro = 0
# minor = 0
# major += 1
# purple_soversion += 1
#
# extra should be similar to one of the following: