(_IO_vsnprintf): Set first byte of destination array to NUL to handle

maxlen==1 case correctly.

diff --git a/libio/vsnprintf.c b/libio/vsnprintf.c
index af901bf3e67a2471c6ee02e167346d9709cec147..c95b2fc7ba0f0d0e1ef466b12b74b59d82ef7319 100644 (file)
--- a/libio/vsnprintf.c
+++ b/libio/vsnprintf.c
@@ -45,6 +45,7 @@ _IO_vsnprintf (string, maxlen, format, args)
 
   _IO_init ((_IO_FILE *) &sf, 0);
   _IO_JUMPS ((_IO_FILE *) &sf) = &_IO_str_jumps;
+  string[0] = '\0';
   _IO_str_init_static ((_IO_FILE *) &sf, string, maxlen - 1, string);
   ret = _IO_vfprintf ((_IO_FILE *) &sf, format, args);
   *((_IO_FILE *) &sf)->_IO_write_ptr = '\0';