patch 7.4.1180

Problem:    Crash with invalid argument to glob2regpat().
Solution:   Check for NULL. (Justin M. Keyes, closes #596)  Add a test.

Author: brammool

src/eval.c

@@ -12993,7 +12993,8 @@ f_glob2regpat(argvars, rettv)
     char_u	*pat = get_tv_string_chk(&argvars[0]);
 
     rettv->v_type = VAR_STRING;
-    rettv->vval.v_string = file_pat_to_reg_pat(pat, NULL, NULL, FALSE);
+    rettv->vval.v_string = (pat == NULL)
+			 ? NULL : file_pat_to_reg_pat(pat, NULL, NULL, FALSE);
 }
 
 /*

src/testdir/test_alot.vim

@@ -5,6 +5,7 @@ source test_backspace_opt.vim
 source test_cursor_func.vim
 source test_delete.vim
 source test_expand.vim
+source test_glob2regpat.vim
 source test_json.vim
 source test_lispwords.vim
 source test_menu.vim

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1180,
 /**/
     1179,
 /**/