patch 8.1.0145: test with grep is failing on MS-Windows

Problem:    Test with grep is failing on MS-Windows.
Solution:   Skip the test.
diff --git a/src/testdir/test_quickfix.vim b/src/testdir/test_quickfix.vim
index 5e8b993..a4006b0 100644
--- a/src/testdir/test_quickfix.vim
+++ b/src/testdir/test_quickfix.vim
@@ -3457,14 +3457,17 @@
   call assert_equal(4, line('.'))
   autocmd! QuickFixCmdPost
 
-  " Test for grep/lgrep
-  call g:Xsetlist([], 'f')
-  Xexpr 'Xtestfile1:2:Line2'
-  autocmd QuickFixCmdPost * Xolder
-  silent Xgrep Line5 Xtestfile2
-  call assert_equal('Xtestfile2', bufname(''))
-  call assert_equal(5, line('.'))
-  autocmd! QuickFixCmdPost
+  " The grepprg may not be set on non-Unix systems
+  if has('unix')
+    " Test for grep/lgrep
+    call g:Xsetlist([], 'f')
+    Xexpr 'Xtestfile1:2:Line2'
+    autocmd QuickFixCmdPost * Xolder
+    silent Xgrep Line5 Xtestfile2
+    call assert_equal('Xtestfile2', bufname(''))
+    call assert_equal(5, line('.'))
+    autocmd! QuickFixCmdPost
+  endif
 
   " Test for vimgrep/lvimgrep
   call g:Xsetlist([], 'f')
diff --git a/src/version.c b/src/version.c
index 07e34fc..ea289c7 100644
--- a/src/version.c
+++ b/src/version.c
@@ -790,6 +790,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    145,
+/**/
     144,
 /**/
     143,