+ call SwapVectors before and after Exec under FPC as well. SwapVectors is

  implemented on two FPC platforms (go32v2 and msdos). On the platforms that
  don't need it, it does nothing, so it's safe to call on all platforms.

git-svn-id: trunk@28060 -

tests/test/units/dos/tdos.pp

@@ -71,17 +71,13 @@ begin
   writeln('Exec Functions');
   writeln('**************');
   write('Going to Exec of ''hello -good -day''');
-{$ifndef FPC}
   SwapVectors;
-{$endif FPC}
 {$ifdef noexesuffix}
   Exec(exedir+'hello','-good -day');
 {$else}
   Exec(exedir+'hello.exe','-good -day');
 {$endif}
-{$ifndef FPC}
   SwapVectors;
-{$endif FPC}
   writeln('Exit should be 213 : ',DosExitCode);
   writeln('Error code should be 0 : ',DosError);
 end;

tests/test/units/dos/tidos.pp

@@ -75,17 +75,13 @@ begin
   writeln('**************');
   write('Press Enter for an Exec of ''hello -good -day''');
   Readln;
-{$ifndef FPC}
   SwapVectors;
-{$endif FPC}
 {$ifdef noexesuffix}
   Exec('hello','-good -day');
 {$else}
   Exec('hello.exe','-good -day');
 {$endif}
-{$ifndef FPC}
   SwapVectors;
-{$endif FPC}
   writeln('Exit should be 213 : ',DosExitCode);
   writeln('Error code should be 0 : ',DosError);
   write('Press Enter');