code style: Avoid gratuitous 'continue;' statements.
* gettext-tools/src/file-list.c (read_names_from_file): Use 'if' instead of
'continue'.
* gettext-tools/src/its.c (its_rule_list_add_from_doc): Likewise.
* gettext-tools/src/locating-rule.c (locating_rule_list_add_from_file):
Likewise.
* gettext-tools/src/msgfmt.c (get_languages): Likewise.
* gettext-tools/src/x-javascript.c (phase5_scan_xml_markup): Likewise.
* gettext-tools/src/x-lua.c (phase2_getc): Likewise.
* gettext-tools/src/read-desktop.c (desktop_lex): Use 'if' instead of 'switch'
with few alternatives. Test for EOF first.
