[PATCH] fix printf regression with alt-form octal, default precision

["Dmitry V. Levin" <ldv@altlinux.org>]

commit v1.1.5-10-gb91cdbe2bc8b626aa04dc6e3e84345accf34e4b1 that fixed
behavior of printf with alt-form octal, zero precision, zero value,
at the same time broke alt-form octal with default precision,
e. g. printf("%#09o", 1).
---
 src/stdio/vfprintf.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/stdio/vfprintf.c b/src/stdio/vfprintf.c
index 2ecf769..ac2891c 100644
--- a/src/stdio/vfprintf.c
+++ b/src/stdio/vfprintf.c
@@ -570,7 +570,14 @@ static int printf_core(FILE *f, const char *fmt, va_list *ap, union arg *nl_arg,
 			if (0) {
 		case 'o':
 			a = fmt_o(arg.i, z);
-			if ((fl&ALT_FORM) && p<z-a+1) p=z-a+1;
+			if (fl&ALT_FORM) {
+				if (p >= 0 && p<z-a+1) {
+					p=z-a+1;
+				} else if (arg.i) {
+					prefix+=5;
+					pl=1;
+				}
+			}
 			} if (0) {
 		case 'd': case 'i':
 			pl=1;

-- 
ldv