builtin/add.c: simplify boolean variables

Do not to explicitly initialize static variables to 0 and instead
let BSS take care of it.  Also use OPT_BOOL() to let the command
line arguments set these variables to 0 or 1, instead of the
deprecated OPT_BOOLEAN() aka OPT_COUNTUP().

Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/add.c

@@ -270,23 +270,23 @@ static struct lock_file lock_file;
 static const char ignore_error[] =
 N_("The following paths are ignored by one of your .gitignore files:\n");
 
-static int verbose = 0, show_only = 0, ignored_too = 0, refresh_only = 0;
-static int ignore_add_errors, addremove, intent_to_add, ignore_missing = 0;
+static int verbose, show_only, ignored_too, refresh_only;
+static int ignore_add_errors, addremove, intent_to_add, ignore_missing;
 
 static struct option builtin_add_options[] = {
 	OPT__DRY_RUN(&show_only, N_("dry run")),
 	OPT__VERBOSE(&verbose, N_("be verbose")),
 	OPT_GROUP(""),
-	OPT_BOOLEAN('i', "interactive", &add_interactive, N_("interactive picking")),
-	OPT_BOOLEAN('p', "patch", &patch_interactive, N_("select hunks interactively")),
-	OPT_BOOLEAN('e', "edit", &edit_interactive, N_("edit current diff and apply")),
+	OPT_BOOL('i', "interactive", &add_interactive, N_("interactive picking")),
+	OPT_BOOL('p', "patch", &patch_interactive, N_("select hunks interactively")),
+	OPT_BOOL('e', "edit", &edit_interactive, N_("edit current diff and apply")),
 	OPT__FORCE(&ignored_too, N_("allow adding otherwise ignored files")),
-	OPT_BOOLEAN('u', "update", &take_worktree_changes, N_("update tracked files")),
-	OPT_BOOLEAN('N', "intent-to-add", &intent_to_add, N_("record only the fact that the path will be added later")),
-	OPT_BOOLEAN('A', "all", &addremove, N_("add changes from all tracked and untracked files")),
-	OPT_BOOLEAN( 0 , "refresh", &refresh_only, N_("don't add, only refresh the index")),
-	OPT_BOOLEAN( 0 , "ignore-errors", &ignore_add_errors, N_("just skip files which cannot be added because of errors")),
-	OPT_BOOLEAN( 0 , "ignore-missing", &ignore_missing, N_("check if - even missing - files are ignored in dry run")),
+	OPT_BOOL('u', "update", &take_worktree_changes, N_("update tracked files")),
+	OPT_BOOL('N', "intent-to-add", &intent_to_add, N_("record only the fact that the path will be added later")),
+	OPT_BOOL('A', "all", &addremove, N_("add changes from all tracked and untracked files")),
+	OPT_BOOL( 0 , "refresh", &refresh_only, N_("don't add, only refresh the index")),
+	OPT_BOOL( 0 , "ignore-errors", &ignore_add_errors, N_("just skip files which cannot be added because of errors")),
+	OPT_BOOL( 0 , "ignore-missing", &ignore_missing, N_("check if - even missing - files are ignored in dry run")),
 	OPT_END(),
 };