patch 9.0.0642: breakindent test fails

Problem:    Breakindent test fails.
Solution:   Correct logic for resetting need_showbreak.
diff --git a/src/drawline.c b/src/drawline.c
index ccfc8a4..79ce514 100644
--- a/src/drawline.c
+++ b/src/drawline.c
@@ -541,7 +541,7 @@
 	wlv->c_extra = NUL;
 	wlv->c_final = NUL;
 	wlv->n_extra = (int)STRLEN(sbr);
-	if ((wp->w_skipcol == 0 && wlv->startrow == 0) || !wp->w_p_wrap)
+	if (wp->w_skipcol == 0 || wlv->startrow != 0 || !wp->w_p_wrap)
 	    wlv->need_showbreak = FALSE;
 	wlv->vcol_sbr = wlv->vcol + MB_CHARLEN(sbr);
 	// Correct end of highlighted area for 'showbreak',
diff --git a/src/version.c b/src/version.c
index 09f4757..786a866 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    642,
+/**/
     641,
 /**/
     640,