patch 8.0.0563: crash when getting the window position in tmux

Problem:    Crash when getting the window position in tmux. (Marvin Schmidt)
Solution:   Add t_GP to the list of terminal options. (closes #1627)

src/option.c

@@ -3174,6 +3174,7 @@ static struct vimoption options[] =
     p_term("t_vi", T_VI)
     p_term("t_vs", T_VS)
     p_term("t_WP", T_CWP)
+    p_term("t_GP", T_CGP)
     p_term("t_WS", T_CWS)
     p_term("t_xn", T_XN)
     p_term("t_xs", T_XS)

src/version.c

@@ -764,6 +764,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    563,
 /**/
     562,
 /**/