add proper fuxed-based locking for stdio

[musl] / src / stdio / vfprintf.c

diff --git a/src/stdio/vfprintf.c b/src/stdio/vfprintf.c
index 2c4fdf3..4c990e5 100644 (file)
--- a/src/stdio/vfprintf.c
+++ b/src/stdio/vfprintf.c
@@ -570,8 +570,11 @@ static int printf_core(FILE *f, const char *fmt, va_list *ap, union arg *nl_arg,
                case 'u':
                        a = fmt_u(arg.i, z);
                        }
-                       if (!arg.i && !p) continue;
                        if (p>=0) fl &= ~ZERO_PAD;
+                       if (!arg.i && !p) {
+                               a=z;
+                               break;
+                       }
                        p = MAX(p, z-a + !arg.i);
                        break;
                case 'c':