updated to 7.3.1251

updated to 7.3.1251

7.3.1234  (after 7.3.1229) Python: Strings are not marked for translate
7.3.1235  inserting CTRL-] differs between insert and command-line mode
7.3.1236  Python: WindowSetattr() missing support for NUMBER_UNSIGNED
7.3.1237  Python: non-import errors not handled correctly
7.3.1238  crash in Python interface on 64 bit machines
7.3.1239  can't build with Python and MSVC10
7.3.1240  memory leak in findfile()
7.3.1241  (after 7.3.1236) some test files missing from distribution
7.3.1242  no failure when trying to use a number as a string
7.3.1243  back references in look-behind match don't work
7.3.1244  MS-Windows: confirm() dialog text may not fit
7.3.1245  MS-Windows: confirm() dialog text may still not fit
7.3.1246  wrong window layout when resizing with 'winfixheight' set
7.3.1247  pattern '[ ]\@!\p\%([ ]\@!\p\)*:' does not always match
7.3.1248  still have old hacking code for Input Method
7.3.1249  modeline not recognized when using "Vim" instead of "vim"
7.3.1250  Python tests fail on MS-Windows
7.3.1251  test 61 messes up viminf.