[Bug 41231] New: regedit no longer processes registry input from stdin using "-" as filename

https://bugs.winehq.org/show_bug.cgi?id=41231

Bug ID: 41231
           Summary: regedit no longer processes registry input from stdin
                    using "-" as filename
           Product: Wine
           Version: unspecified
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: P2
         Component: programs
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

regedit since around 1.9.17 no longer processes registry input from stdin:

Steps to reproduce:
1. run command from shell: regedit -
2. add appropriate registry input lines in stdin and end with Ctrl-D

Expected: the registry entry should be added in registry (use regedit GUI to
view)
Actual: No change in registry

This looks like a regression after commit 256290f "regedit: Parse command-line
input using Unicode". In regedit.c PerformRegAction(), after testing if "-" and
setting reg_file=stdin, it skips over "else" statement and just reaches break
statement without calling import_registry_file().