small fix for lib/sh/snprintf.c

[Petr Sumbera]

Hi,

we are running Bash 3.2.38 on Solaris 10 where asprintf() isn't 
available. Thus code in snprintf.c is used.

There is a problem with following command:

bash -c 'printf "x%10.0fx\n" 123'
x0000000123x

Where correct output should be:
x       123x

It seems that '0' after '.' enables zero padding. Please see proposed 
patch bellow:

--- bash-3.2.48/lib/sh/snprintf.c       Tue Dec 12 12:10:18 2006
+++ bash-3.2.48/lib/sh/snprintf.c       Thu Apr 12 08:55:44 2012
@@ -1277,6 +1277,8 @@
                data->flags |= PF_ALTFORM;
                continue;
              case '0':
+               if (data->flags & PF_DOT)
+                 continue;
                data->flags |= PF_ZEROPAD;
                data->pad = '0';
                continue;

The same code seems to be also in Bash 4.1 so I guess the problem is 
still there.

Any comments?

Thanks,

Petr