[Bug 37224] winemaker generated wine.dsw fails to load with Visual Express 2005

https://bugs.winehq.org/show_bug.cgi?id=37224

--- Comment #2 from Austin English  ---
(In reply to André H. from comment #1)
> could you please delete parts of the file until you find the bad line?
> (do it like a bisect)

Between amstream and apphelp, there are several empty projects like:
###############################################################################

Project: ""=.\ - Package Owner=<4>

Package=<5>
{{{
}}}

Package=<4>
{{{
    Begin Project Dependency
    Project_Dep_Name include
    End Project Dependency
    Begin Project Dependency
    Project_Dep_Name wine
    End Project Dependency
    Begin Project Dependency
    Project_Dep_Name winebuild
    End Project Dependency
}}}

that seems to be the first issue. When generating the msvc files, I see several
warnings from perl:
[austin@localhost wine-vc]$ ./tools/winapi/msvcmaker 
wine.dswUse of uninitialized value $project in string eq at
./tools/winapi/msvcmaker line 1103.
Use of uninitialized value $project in string eq at ./tools/winapi/msvcmaker
line 1105.
Use of uninitialized value $project in pattern match (m//) at
./tools/winapi/msvcmaker line 1107.
Use of uninitialized value $project in pattern match (m//) at
./tools/winapi/msvcmaker line 1113.
Use of uninitialized value $dsp_file in concatenation (.) or string at
./tools/winapi/msvcmaker line 1043.
Use of uninitialized value $project in concatenation (.) or string at
./tools/winapi/msvcmaker line 1050.