[PATCH 2/2] http-backend: Let gcc check the format of more printf-type functions.

[Tarmigan Casebolt <tarmigan+git@gmail.com>]

We already have these checks in many printf-type functions that have
prototypes which are in header files.  Add these same checks to
static functions in http-backend.c

Signed-off-by: Tarmigan Casebolt <tarmigan+git@gmail.com>
---

Shawn, please consider this patch in addition to the one that you posted 
that actually fixes the bug.  With this patch, gcc will warn about that bug.

 http-backend.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/http-backend.c b/http-backend.c
index ab9433d..110b166 100644
--- a/http-backend.c
+++ b/http-backend.c
@@ -108,6 +108,7 @@ static const char *get_parameter(const char *name)
 	return i ? i->util : NULL;
 }
 
+__attribute__((format (printf, 2, 3)))
 static void format_write(int fd, const char *fmt, ...)
 {
 	static char buffer[1024];
@@ -165,6 +166,7 @@ static void end_headers(void)
 	safe_write(1, "\r\n", 2);
 }
 
+__attribute__((format (printf, 1, 2)))
 static NORETURN void not_found(const char *err, ...)
 {
 	va_list params;
@@ -180,6 +182,7 @@ static NORETURN void not_found(const char *err, ...)
 	exit(0);
 }
 
+__attribute__((format (printf, 1, 2)))
 static NORETURN void forbidden(const char *err, ...)
 {
 	va_list params;
-- 
1.6.5.51.g191f5