patch 8.0.0223: Coverity warns for an uninitialized variable

Problem:    Coverity gets confused by the flags passed to find_tags() and
            warnts for an uninitialized variable.
Solution:   Disallow using cscope and help tags at the same time.

src/Makefile

@@ -2150,6 +2150,7 @@ test_arglist \
 	test_perl \
 	test_popup \
 	test_profile \
+	test_put \
 	test_quickfix \
 	test_regexp_latin \
 	test_regexp_utf8 \

src/ops.c

@@ -3550,7 +3550,7 @@ do_put(
      */
     if (y_type == MBLOCK)
     {
-	char	c = gchar_cursor();
+	int	c = gchar_cursor();
 	colnr_T	endcol2 = 0;
 
 	if (dir == FORWARD && c != NUL)

src/tag.c

@@ -1256,6 +1256,7 @@ prepare_pats(pat_T *pats, int has_re)
  * TAG_REGEXP	  use "pat" as a regexp
  * TAG_NOIC	  don't always ignore case
  * TAG_KEEP_LANG  keep language
+ * TAG_CSCOPE	  use cscope results for tags
  */
     int
 find_tags(
@@ -1423,6 +1424,14 @@ find_tags(
      */
     if (help_only)				/* want tags from help file */
 	curbuf->b_help = TRUE;			/* will be restored later */
+#ifdef FEAT_CSCOPE
+    else if (use_cscope)
+    {
+	/* Make sure we don't mix help and cscope, confuses Coverity. */
+	help_only = FALSE;
+	curbuf->b_help = FALSE;
+    }
+#endif
 
     orgpat.len = (int)STRLEN(pat);
 #ifdef FEAT_MULTI_LANG
@@ -2281,7 +2290,8 @@ parse_line:
 		     */
 		    *tagp.tagname_end = NUL;
 		    len = (int)(tagp.tagname_end - tagp.tagname);
-		    mfp = (char_u *)alloc((int)sizeof(char_u) + len + 10 + ML_EXTRA + 1);
+		    mfp = (char_u *)alloc((int)sizeof(char_u)
+						    + len + 10 + ML_EXTRA + 1);
 		    if (mfp != NULL)
 		    {
 			int heuristic;

src/testdir/test_alot.vim

@@ -31,6 +31,7 @@ source test_mapping.vim
 source test_messages.vim
 source test_partial.vim
 source test_popup.vim
+source test_put.vim
 source test_reltime.vim
 source test_searchpos.vim
 source test_set.vim

src/testdir/test_put.vim

@@ -0,0 +1,12 @@
+
+func Test_put_block()
+  if !has('multi_byte')
+    return
+  endif
+  new
+  call feedkeys("i\<C-V>u2500\<CR>x\<ESC>", 'x')
+  call feedkeys("\<C-V>y", 'x')
+  call feedkeys("gg0p", 'x')
+  call assert_equal("\u2500x", getline(1))
+  bwipe!
+endfunc

src/version.c

@@ -764,6 +764,10 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    223,
+/**/
+    222,
 /**/
     221,
 /**/