[PATCH resend] status: store format option as an int

It is unsafe to pass a pointer to a value of enumerated type to
OPT_SET_INT (as v1.7.0-rc0~137^2~14, 2009-09-05, does), since it might
have the wrong alignment or width.  C99 only says "Each enumerated
type shall be compatible with char, a signed integer type, or an
unsigned integer type.  The choice of type is implementation-defined,
but shall be capable of representing the values of all the members of
the enumeration."

Probably this hasn't come up in practice because GCC uses an 'int' to
represent small enums unless passed -fshort-enums, except on certain
architectures where -fshort-enums is the default.

Noticed-by: Jeff King [off-list ref]
Signed-off-by: Jonathan Nieder <redacted>
Acked-by: Jeff King <redacted>
---
I last sent this about a month ago and it seemed ok.  The changes
since last time are to the commit message:

 - hopefully it parses as English now
 - adding Jeff's ack

Thanks again, both.

 builtin/commit.c |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/builtin/commit.c b/builtin/commit.c
index 411d5e4..64808aa 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c

@@ -108,11 +108,12 @@ static const char *only_include_assumed;
 static struct strbuf message;
 
 static int null_termination;
-static enum {
-	STATUS_FORMAT_LONG,
+enum status_format {
+	STATUS_FORMAT_LONG = 0,
 	STATUS_FORMAT_SHORT,
 	STATUS_FORMAT_PORCELAIN
-} status_format = STATUS_FORMAT_LONG;
+};
+static int status_format;
 static int status_show_branch;
 
 static int opt_parse_m(const struct option *opt, const char *arg, int unset)

-- 
1.7.5.1