install <install_path> doesn't work on HEAD

On my win-7, I am facing $SUBJECT.  I am consistently getting below error:

On digging, I found that it started failing with commit 3a7cc727 (Don't fall off the end of perl functions).  It seems that we have added empty 'return' in all of the functions which seems to break one of the case:

lcopy("$conf\\$pf\\$pf.$ext", "$target\\$dir\\$pf.$ext")
|| croak "Could not copy $pf.$ext\n";

I think the return from lcopy implies 0 (or undef) which cause it to fail.  By reading couple of articles on net [1][2] related to this, it seems we can't blindly return in all cases.  On changing, the lcopy as below, install appears to be working.

@@ -40,7 +40,7 @@ sub lcopy
        copy($src, $target)
          || confess "Could not copy $src to $target\n";
-       return;
+       return 1;
 }

I have randomly check some of the other functions where this patch has added 'return' and those seem to be fine.