Fix infinite loop while word-wrapping string in draw_text()

draw_text-fix.diff

diff --git a/src/emu/ui/ui.c b/src/emu/ui/ui.c
index c3041a7..0eee040 100644
--- a/src/emu/ui/ui.c
+++ b/src/emu/ui/ui.c
@@ -694,6 +694,9 @@ void ui_manager::draw_text_full(render_container *container, const char *origs,
                                                break;
 
                                        curwidth -= get_font()->char_width(lineheight, aspect, schar);
+                                       // if back to 0, there is no space to draw even a single char
+                                       if (curwidth <= 0)
+                                               break;
                                }
                        }