patch 8.2.3357: crash when 'virtualedit' is set and window is narrow

Problem:    Crash when 'virtualedit' is set and window is narrow. ()
Solution:   Check that width is not zero. (closes #8767)

Author: brammool

src/misc2.c

@@ -161,7 +161,8 @@ coladvance2(
 	if (finetune
 		&& curwin->w_p_wrap
 		&& curwin->w_width != 0
-		&& wcol >= (colnr_T)width)
+		&& wcol >= (colnr_T)width
+		&& width > 0)
 	{
 	    csize = linetabsize(line);
 	    if (csize > 0)

src/testdir/test_number.vim

@@ -320,4 +320,15 @@ func Test_number_rightleft()
   bw!
 endfunc
 
+" This used to cause a divide by zero
+func Test_number_no_text_virtual_edit()
+  vnew
+  call setline(1, ['line one', 'line two'])
+  set number virtualedit=all
+  normal w
+  4wincmd |
+  normal j
+  bwipe!
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab

src/version.c

@@ -755,6 +755,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3357,
 /**/
     3356,
 /**/