FYI: On the way to -w

[Akim Demaille]

I preferred to have transform _required_ a defined value for each key,
to make sure there are no accidents.  So I fixed the sites where
%transform receives an uninitialized value.

There are many other places to fix, most typically $2 etc. which do
not exist, such as in the example below.

Index: ChangeLog
from  Akim Demaille  <address@hidden>
        * automake.in (&handle_options): Change the RE so that the third
        part of the versions always exist.
        (&file_contents): Don't pass uninitialized values to &transform.

2001-03-05  Akim Demaille  <address@hidden>

Index: automake.in
===================================================================
RCS file: /cvs/automake/automake/automake.in,v
retrieving revision 1.969
diff -u -u -r1.969 automake.in
--- automake.in 2001/03/05 19:11:31 1.969
+++ automake.in 2001/03/05 19:28:41
@@ -1185,14 +1185,14 @@
            {
                $use_dependencies = 0;
            }
-           elsif (/([0-9]+)\.([0-9]+)([a-z])?/)
+           elsif (/([0-9]+)\.([0-9]+)([a-z]?)/)
            {
                # Got a version number.
 
                my ($rmajor, $rminor, $ralpha) = ($1, $2, $3);
 
                &prog_error ("version is incorrect: $VERSION")
-                   if $VERSION !~ /([0-9]+)\.([0-9]+)([a-z])?/;
+                   if $VERSION !~ /([0-9]+)\.([0-9]+)([a-z]?)/;
 
                my ($tmajor, $tminor, $talpha) = ($1, $2, $3);
 
@@ -6634,14 +6634,14 @@
                      'MAINTAINER-MODE'
                      => $seen_maint_mode ? '@MAINTAINER_MODE_TRUE@' : '',
 
-                     'SHAR'        => $options{'dist-shar'},
-                     'BZIP2'       => $options{'dist-bzip2'},
-                     'ZIP'         => $options{'dist-zip'},
-                     'COMPRESS'    => $options{'dist-tarZ'},
+                     'SHAR'        => $options{'dist-shar'} || 0,
+                     'BZIP2'       => $options{'dist-bzip2'} || 0,
+                     'ZIP'         => $options{'dist-zip'} || 0,
+                     'COMPRESS'    => $options{'dist-tarZ'} || 0,
 
                      'INSTALL-INFO' => !$options{'no-installinfo'},
                      'INSTALL-MAN'  => !$options{'no-installman'},
-                     'CK-NEWS'      => $options{'check-news'},
+                     'CK-NEWS'      => $options{'check-news'} || 0,
 
                      'SUBDIRS'      => &variable_defined ('SUBDIRS'),
                      'CONFIGURE-AC' => $configure_ac,