dbus-top: use mvwaddstr when no arguments are needed

Currently, some of the code uses mvwprintw to print a string without
using a format string, this causes the following errors:

error: format not a string literal and no format arguments
[-Werror=format-security]

The fix is to use mvwaddstr when no arguments are needed.

Signed-off-by: Sui Chen <suichen@google.com>
Change-Id: Ib17ad7a7795cb7bf77161f8730139f38216b7aba
diff --git a/dbus-top/main.cpp b/dbus-top/main.cpp
index d56b72e..5293f9b 100644
--- a/dbus-top/main.cpp
+++ b/dbus-top/main.cpp
@@ -98,12 +98,12 @@
         ret++;
         if (static_cast<int>(txt.size()) > width)
         {
-            mvwprintw(win, y, x, txt.substr(0, width).c_str());
+            mvwaddstr(win, y, x, txt.substr(0, width).c_str());
             txt = txt.substr(width);
         }
         else
         {
-            mvwprintw(win, y, x, txt.c_str());
+            mvwaddstr(win, y, x, txt.c_str());
             break;
         }
         y++;