fpspreadsheet: Fix compilation of new Excel unit test for non-Windows systems.

git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@4536 8e941d3f-bd1b-0410-a28a-d453659cc2b4

components/fpspreadsheet/tests/exceltests.pas

@@ -8,6 +8,7 @@ interface
   Will be skipped if Excel is not available.
 }
 
+{$ifdef windows}
 uses
   // Not using Lazarus package as the user may be working with multiple versions
   // Instead, add .. to unit search path
@@ -61,8 +62,11 @@ type
 
   end;
 
+{$endif}
+
 implementation
 
+{$ifdef windows}
 uses
   TypInfo, comobj;
 
@@ -387,5 +391,7 @@ end;
 initialization
   RegisterTest(TSpreadExcelTests);
 
+{$endif}
+
 end.