updated to 7.3.1212

updated to 7.3.1212

7.3.1201  on startup preview window may be used as the current window
7.3.1202  tags are not found in case-folded tags file
7.3.1203  matches from matchadd() might be highlighted incorrectly
7.3.1204  calling gettabwinvar() in 'tabline' cancels Visual mode
7.3.1205  logtalk.dict is not removed on uninstall
7.3.1206  inconsistent function argument declarations
7.3.1207  new regexp engine: no match found on "#if FOO"
7.3.1208  compiler warnings on MS-Windows
7.3.1209  no completion for ":tabdo"
7.3.1210  (after 7.3.1182) 'backupcopy' default on MS-Windows is wrong
7.3.1211  MS-Windows: ":hardcopy" does not work properly
7.3.1212  "make test" on MS-Windows does not report like Unix does