core: fix display of combining chars (patch from Nei) (bug #37775)

ChangeLog

@@ -1,12 +1,13 @@
 WeeChat ChangeLog
 =================
 Sébastien Helleu <flashcode@flashtux.org>
-v0.4.0-dev, 2012-11-27
+v0.4.0-dev, 2012-11-30
 
 
 Version 0.4.0 (under dev!)
 --------------------------
 
+* core: fix display of combining chars (bug #37775)
 * core: display default values for changed config options in output of /set
 * core: stop cmake if gcrypt lib is not found (bug #37671)
 * core: add incomplete mouse events "event-down" and "event-drag" (task #11840)

src/gui/curses/gui-curses-bar-window.c

@@ -334,7 +334,7 @@ gui_bar_window_print_string (struct t_gui_bar_window *bar_window,
                 }
 
                 size_on_screen = utf8_char_size_screen (utf_char);
-                if (size_on_screen > 0)
+                if (size_on_screen >= 0)
                 {
                     if (hide_chars_if_scrolling
                         && (x_with_hidden < bar_window->scroll_x))

src/gui/curses/gui-curses-chat.c

@@ -391,7 +391,7 @@ gui_chat_display_word_raw (struct t_gui_window *window, struct t_gui_line *line,
             {
                 return chars_displayed;
             }
-            if (display_char && (size_on_screen > 0))
+            if (display_char && (size_on_screen >= 0))
             {
                 if (!simulate)
                 {

src/gui/gui-chat.c

@@ -242,7 +242,7 @@ gui_chat_string_real_pos (const char *string, int pos)
     real_pos = string;
     real_pos_prev = string;
     ptr_string = string;
-    while (ptr_string && ptr_string[0] && (pos > 0))
+    while (ptr_string && ptr_string[0] && (pos >= 0))
     {
         ptr_string = gui_chat_string_next_char (NULL, NULL,
                                                 (unsigned char *)ptr_string,