Move Win32-only code under source/win32 for clarity

shell/prj/build.lst

@@ -9,8 +9,8 @@ sl    shell\source\all                             nmake   -   all sl_all sl_inc
 sl    shell\source\unix\sysshell                   nmake   -   u   sl_unix_sysshell sl_all sl_inc NULL
 sl    shell\source\tools\lngconvex                 nmake   -   all sl_win32_lngconv sl_inc NULL
 sl    shell\source\tools\regsvrex                  nmake   -   w   sl_win32_regsvrex  sl_inc NULL
-sl    shell\source\all\zipfile                     nmake   -   w   sl_all_zipfile  sl_inc NULL
-sl    shell\source\all\ooofilereader               nmake   -   w   sl_all_ooofilereader sl_all_zipfile.w sl_all sl_inc NULL
+sl    shell\source\win32\zipfile                   nmake   -   w   sl_win32_zipfile  sl_inc NULL
+sl    shell\source\win32\ooofilereader             nmake   -   w   sl_win32_ooofilereader sl_win32_zipfile.w sl_all sl_inc NULL
 sl    shell\source\win32\shlxthandler\res          nmake   -   w   sl_win32_shlxthandler_res sl_win32_lngconv.w sl_inc NULL
 sl    shell\source\win32\shlxthandler\util         nmake   -   w   sl_win32_shlxthandler_util  sl_inc NULL
 sl    shell\source\win32\shlxthandler\propsheets   nmake   -   w   sl_win32_shlxthandler_propsheets  sl_inc NULL
@@ -18,7 +18,7 @@ sl    shell\source\win32\shlxthandler\infotips     nmake   -   w   sl_win32_shlx
 sl    shell\source\win32\shlxthandler\columninfo   nmake   -   w   sl_win32_shlxthandler_columninfo  sl_inc NULL
 sl    shell\source\win32\shlxthandler\thumbviewer  nmake   -   w   sl_win32_shlxthandler_thumbviewer sl_inc NULL
 sl    shell\source\win32\shlxthandler\prophdl      nmake   -   w   sl_win32_shlxthandler_prophdl sl_win32_shlxthandler_ooofilt.w sl_inc NULL
-sl    shell\source\win32\shlxthandler              nmake   -   w   sl_win32_shlxthandler sl_win32_lngconv.w sl_win32_shlxthandler_res.w sl_win32_shlxthandler_util.w sl_all_zipfile.w sl_all_ooofilereader.w sl_win32_shlxthandler_propsheets.w sl_win32_shlxthandler_infotips.w sl_win32_shlxthandler_columninfo.w sl_win32_shlxthandler_thumbviewer.w sl_win32_shlxthandler_prophdl.w sl_inc sl_win32_shlxthandler_ooofilt.w NULL
+sl    shell\source\win32\shlxthandler              nmake   -   w   sl_win32_shlxthandler sl_win32_lngconv.w sl_win32_shlxthandler_res.w sl_win32_shlxthandler_util.w sl_win32_zipfile.w sl_win32_ooofilereader.w sl_win32_shlxthandler_propsheets.w sl_win32_shlxthandler_infotips.w sl_win32_shlxthandler_columninfo.w sl_win32_shlxthandler_thumbviewer.w sl_win32_shlxthandler_prophdl.w sl_inc sl_win32_shlxthandler_ooofilt.w NULL
 sl    shell\source\backends\localebe               nmake   -   all sl_backends_localebe sl_inc NULL
 sl    shell\source\backends\wininetbe              nmake   -   w   sl_backends_wininetbe sl_inc NULL
 sl    shell\source\backends\macbe                  nmake   -   u   sl_backends_macbe sl_inc NULL
@@ -26,4 +26,4 @@ sl    shell\source\backends\gconfbe                nmake   -   u   sl_backends_g
 sl    shell\source\backends\kdebe                  nmake   -   u   sl_backends_kdebe sl_inc NULL
 sl    shell\source\backends\kde4be                 nmake   -   u   sl_backends_kde4be sl_inc NULL
 sl    shell\source\backends\desktopbe              nmake   -   u   sl_backends_desktopbe sl_inc NULL
-sl    shell\source\win32\shlxthandler\ooofilt      nmake   -   w   sl_win32_shlxthandler_ooofilt sl_all_zipfile.w sl_all_ooofilereader.w sl_win32_shlxthandler_util.w sl_all sl_inc NULL
+sl    shell\source\win32\shlxthandler\ooofilt      nmake   -   w   sl_win32_shlxthandler_ooofilt sl_win32_zipfile.w sl_win32_ooofilereader.w sl_win32_shlxthandler_util.w sl_all sl_inc NULL