patch 8.0.1215: newer gcc warns for implicit fallthrough

Problem:    Newer gcc warns for implicit fallthrough.
Solution:   Consistently use a FALLTHROUGH comment. (Christian Brabandt)

src/buffer.c

@@ -4325,6 +4325,7 @@ build_stl_str_hl(
 
 	case STL_OFFSET_X:
 	    base = 'X';
+	    /* FALLTHROUGH */
 	case STL_OFFSET:
 #ifdef FEAT_BYTEOFF
 	    l = ml_find_line_or_offset(wp->w_buffer, wp->w_cursor.lnum, NULL);
@@ -4336,6 +4337,7 @@ build_stl_str_hl(
 
 	case STL_BYTEVAL_X:
 	    base = 'X';
+	    /* FALLTHROUGH */
 	case STL_BYTEVAL:
 	    num = byteval;
 	    if (num == NL)

src/edit.c

@@ -5774,13 +5774,16 @@ quote_meta(char_u *dest, char_u *src, int len)
 		if (ctrl_x_mode == CTRL_X_DICTIONARY
 					   || ctrl_x_mode == CTRL_X_THESAURUS)
 		    break;
+		/* FALLTHROUGH */
 	    case '~':
 		if (!p_magic)	/* quote these only if magic is set */
 		    break;
+		/* FALLTHROUGH */
 	    case '\\':
 		if (ctrl_x_mode == CTRL_X_DICTIONARY
 					   || ctrl_x_mode == CTRL_X_THESAURUS)
 		    break;
+		/* FALLTHROUGH */
 	    case '^':		/* currently it's not needed. */
 	    case '$':
 		m++;

src/ex_getln.c

@@ -1563,9 +1563,8 @@ getcmdline(
 			break;
 		    goto cmdline_not_changed;
 		}
-		/* FALLTHROUGH */
-
 #ifdef FEAT_CMDHIST
+		/* FALLTHROUGH */
 	case K_UP:
 	case K_DOWN:
 	case K_S_UP:

src/if_perl.xs

@@ -1101,6 +1101,7 @@ perl_to_vim(SV *sv, typval_T *rettv)
 		rettv->vval.v_number = SvIV(sv);
 		break;
 	    }
+	    /* FALLTHROUGH */
 	case SVt_PV:	/* string */
 	{
 	    size_t  len		= 0;

src/message.c

@@ -670,7 +670,8 @@ emsg(char_u *s)
 
 	ex_exitval = 1;
 
-	/* Reset msg_silent, an error causes messages to be switched back on. */
+	/* Reset msg_silent, an error causes messages to be switched back on.
+	 */
 	msg_silent = 0;
 	cmd_silent = FALSE;
 

src/normal.c

@@ -1945,6 +1945,7 @@ do_pending_operator(cmdarg_T *cap, int old_col, int gui_yank)
 		AppendToRedobuff((char_u *)"!\r");  /* use any last used !cmd */
 	    else
 		bangredo = TRUE;    /* do_bang() will put cmd in redo buffer */
+	    /* FALLTHROUGH */
 
 	case OP_INDENT:
 	case OP_COLON:

src/regexp_nfa.c

@@ -4698,6 +4698,7 @@ skip_add:
 		subs = addstate(l, state->out, subs, pim, off_arg);
 		break;
 	    }
+	    /* FALLTHROUGH */
 	case NFA_MCLOSE1:
 	case NFA_MCLOSE2:
 	case NFA_MCLOSE3:

src/version.c

@@ -761,6 +761,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1215,
 /**/
     1214,
 /**/

src/window.c

@@ -433,8 +433,8 @@ newwindow:
 		    g_do_tagpreview = Prenum;
 		else
 		    g_do_tagpreview = p_pvh;
-		/*FALLTHROUGH*/
 #endif
+		/* FALLTHROUGH */
     case ']':
     case Ctrl_RSB:
 		CHECK_CMDWIN
@@ -557,8 +557,8 @@ wingotofile:
 			    g_do_tagpreview = Prenum;
 			else
 			    g_do_tagpreview = p_pvh;
-			/*FALLTHROUGH*/
 #endif
+			/* FALLTHROUGH */
 		    case ']':
 		    case Ctrl_RSB:
 			/* keep Visual mode, can select words to use as a tag */