patch 8.1.0504: when CTRL-C is mapped it triggers InsertLeave

Problem:    When CTRL-C is mapped it triggers InsertLeave.
Solution:   Make CTRL-C behave the same way when typed or used in a mapping.

src/edit.c

@@ -1048,7 +1048,10 @@ doESCkey:
 
 	    if (ins_esc(&count, cmdchar, nomove))
 	    {
-		if (cmdchar != 'r' && cmdchar != 'v')
+		// When CTRL-C was typed got_int will be set, with the result
+		// that the autocommands won't be executed. When mapped got_int
+		// is not set, but let's keep the behavior the same.
+		if (cmdchar != 'r' && cmdchar != 'v' && c != Ctrl_C)
 		    ins_apply_autocmds(EVENT_INSERTLEAVE);
 		did_cursorhold = FALSE;
 		return (c == Ctrl_O);
@@ -2408,7 +2411,7 @@ has_compl_option(int dict_opt)
     int
 vim_is_ctrl_x_key(int c)
 {
-    /* Always allow ^R - let it's results then be checked */
+    // Always allow ^R - let its results then be checked
     if (c == Ctrl_R)
 	return TRUE;
 

src/testdir/test_edit.vim

@@ -1409,3 +1409,33 @@ func Test_edit_alt()
   bwipe XAltFile
   call delete('XAltFile')
 endfunc
+
+func Test_leave_insert_autocmd()
+  new
+  au InsertLeave * let g:did_au = 1
+  let g:did_au = 0
+  call feedkeys("afoo\<Esc>", 'tx')
+  call assert_equal(1, g:did_au)
+  call assert_equal('foo', getline(1))
+
+  let g:did_au = 0
+  call feedkeys("Sbar\<C-C>", 'tx')
+  call assert_equal(0, g:did_au)
+  call assert_equal('bar', getline(1))
+
+  inoremap x xx<Esc>
+  let g:did_au = 0
+  call feedkeys("Saax", 'tx')
+  call assert_equal(1, g:did_au)
+  call assert_equal('aaxx', getline(1))
+
+  inoremap x xx<C-C>
+  let g:did_au = 0
+  call feedkeys("Sbbx", 'tx')
+  call assert_equal(0, g:did_au)
+  call assert_equal('bbxx', getline(1))
+
+  bwipe!
+  au! InsertLeave
+  iunmap x
+endfunc

src/version.c

@@ -792,6 +792,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    504,
 /**/
     503,
 /**/