quick hack to remove the preg_match for * [0-9]+ FETCH in case of

quick hack to remove the preg_match for * [0-9]+ FETCH in case of
sqimap_run_command. Explanation: if we request for a single fetch (not a
list) we shouldn't look for extra fetch lines because this stops the
processing in case of body entities with * a001 fetch lines.
Later we can glue the 2 functions together if we add information to
sqimap_read_data_list about the nature of the call (list or not)

git-svn-id: https://svn.code.sf.net/p/squirrelmail/code/trunk/squirrelmail@3458 7612ce4b-ef26-0410-bec9-ea0150e637f0