patch 7.4.821

Problem:    Coverity reports a few problems.
Solution:   Avoid the warnings. (Christian Brabandt)

src/ex_docmd.c

@@ -4520,6 +4520,9 @@ get_address(ptr, addr_type, skip, to_other_file)
 			pos.col = MAXCOL;
 		    else
 			pos.col = 0;
+#ifdef FEAT_VIRTUALEDIT
+		    pos.coladd = 0;
+#endif
 		    if (searchit(curwin, curbuf, &pos,
 				*cmd == '?' ? BACKWARD : FORWARD,
 				(char_u *)"", 1L, SEARCH_MSG,

src/option.c

@@ -9990,6 +9990,8 @@ unset_global_local_option(name, from)
     buf_T	*buf = (buf_T *)from;
 
     opt_idx = findoption(name);
+    if (opt_idx < 0)
+	return;
     p = &(options[opt_idx]);
 
     switch ((int)p->indir)

src/screen.c

@@ -7801,7 +7801,7 @@ next_search_hl_pos(shl, lnum, posmatch, mincol)
 	}
     }
     posmatch->cur = 0;
-    if (shl->lnum == lnum)
+    if (shl->lnum == lnum && bot >= 0)
     {
 	colnr_T	start = posmatch->pos[bot].col == 0
 					     ? 0 : posmatch->pos[bot].col - 1;

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    821,
 /**/
     820,
 /**/