inet_ntop4: avoid inline initialization

We only need to set the first byte to 0, but gcc likes to zero out the
rest of the string with memset() when using this initialization style.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

libc/inet/ntop.c

@@ -51,10 +51,12 @@
 static const char *
 inet_ntop4(const u_char *src, char *dst, size_t size)
 {
-	char tmp[sizeof ("255.255.255.255") + 1] = "\0";
+	char tmp[sizeof ("255.255.255.255") + 1];
 	int octet;
 	int i;
 
+	tmp[0] = '\0';
+
 	i = 0;
 	for (octet = 0; octet <= 3; octet++) {