patch 9.0.0161: warning for uninitialized variable

Problem:    Warning for uninitialized variable. (Tony Mechelynck)
Solution:   Initialize line_attr_save.

src/drawline.c

@@ -588,7 +588,7 @@ win_line(
 	|| defined(FEAT_SYN_HL) || defined(FEAT_DIFF)
 # define LINE_ATTR
     int		line_attr = 0;		// attribute for the whole line
-    int		line_attr_save;
+    int		line_attr_save = 0;
 #endif
 #ifdef FEAT_SIGNS
     int		sign_present = FALSE;

src/version.c

@@ -735,6 +735,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    161,
 /**/
     160,
 /**/