[Bug 56655] New: Regression: X11 Driver fails to load

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=56655

Bug ID: 56655
           Summary: Regression: X11 Driver fails to load
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: P2
         Component: winex11.drv
          Assignee: [e-mail]
          Reporter: [e-mail]
   Regression SHA1: f74900ad1a580eda8fd4923cbd4881b42b042733
      Distribution: ---

Created attachment 76428
  --> https://bugs.winehq.org/attachment.cgi?id=76428
Fix X11 driver

Building with the latest from master, I found the X11 driver fails to load. The
attempt to load appears to enter a tight loop and Wine becomes unresponsive.

A git bisect led me to f74900ad1a580eda8fd4923cbd4881b42b042733.

I then further narrowed it down to the changes in xrandr10_get_modes.

It looks like the old code used to increment mode_idx, but the new code
doesn't. The attached patch fixes this for me.