patch 8.0.0047

Problem:    Crash when using the preview window from an unnamed buffer.
            (lifepillar)
Solution:   Do not clear the wrong buffer. (closes #1200)

src/popupmnu.c

@@ -582,7 +582,9 @@ pum_set_selected(int n, int repeat)
 
 	    if (curwin->w_p_pvw)
 	    {
-		if (curbuf->b_fname == NULL
+		if (!resized
+			&& curbuf->b_nwindows == 1
+			&& curbuf->b_fname == NULL
 			&& curbuf->b_p_bt[0] == 'n' && curbuf->b_p_bt[2] == 'f'
 			&& curbuf->b_p_bh[0] == 'w')
 		{

src/version.c

@@ -764,6 +764,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    47,
 /**/
     46,
 /**/