Merge branch '1977_mcedit_type_accuracy'
* 1977_mcedit_type_accuracy:
Avoid compiler errors about comparsion signed and unsigned variables
(is_aligned_on_a_tab): return gboolean instead of int. Minor optimization.
Use off_t instead of long for all variables related to position in file:
Use long for line numbers and columns.
(edit_find_word_start): return gboolean instead of int.
(edit_save_cmd): return gboolean instead of int.
(edit_copy_to_X_buf_cmd): return gboolean instead of int.
(edit_save_block): return gboolean instead of int.
(editcmd_dialog_raw_key_query): take gboolean instead of boolean.
(edit_mark_cmd): take gboolean instead of int.
WEdit::caches_valid: change int to gboolean.
(is_in_indent): refactoring, return gboolean instead of int.
Ticket #1977: type accuracy of WEdit members and mceditor functions.