ftp: Portability to Android.

Add external declaration of getpass().
Tiny patch by Fredrik Fornwall <fredrik@fornwall.net>.

ChangeLog

@@ -1,3 +1,16 @@
+2017-03-02  Fredrik Fornwall  <fredrik@fornwall.net>  (tiny change)
+
+	ftp: Portability to Android.
+	Without a check for HAVE_DECL_GETPASS and without making a
+	local function declaration, the implicit declaration causes
+	crashes on 64-bit systems lacking declared getpass(), such
+	as Android.  Reported in:
+	http://lists.gnu.org/archive/html/bug-inetutils/2016-10/msg00000.html
+
+	* ftp/cmds.c [!HAVE_DECL_GETPASS] (user, account): Declare getpass()
+	as external function.
+	* ftp/ftp.c (login): Likewise.
+
 2017-03-02  Mats Erik Andersson  <gnu@gisladisker.se>
 
 	whois: Update Canadian TLD server.

ftp/cmds.c

@@ -1721,6 +1721,9 @@ shell (int argc, char **argv _GL_UNUSED_PARAMETER)
 void
 user (int argc, char **argv)
 {
+#if !HAVE_DECL_GETPASS
+  extern char *getpass ();
+#endif
   char acct[80];
   int n, aflag = 0;
 
@@ -2070,6 +2073,9 @@ globulize (char *cp)
 void
 account (int argc, char **argv)
 {
+#if !HAVE_DECL_GETPASS
+  extern char *getpass ();
+#endif
   char acct[50], *ap;
 
   if (argc > 1)

ftp/ftp.c

@@ -296,6 +296,9 @@ bad:
 int
 login (char *host)
 {
+#if !HAVE_DECL_GETPASS
+  extern char *getpass ();
+#endif
   char tmp[80];
   char *user, *pass, *acct, *p;
   int n, aflag = 0;