patch 7.4.2151

Problem:    Quickfix test fails on MS-Windows.
Solution:   Close the help window. (Christian Brabandt)

src/testdir/test_quickfix.vim

@@ -407,6 +407,7 @@ endfunction
 
 function Test_helpgrep()
   call s:test_xhelpgrep('c')
+  helpclose
   call s:test_xhelpgrep('l')
 endfunc
 

src/version.c

@@ -763,6 +763,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2151,
 /**/
     2150,
 /**/