patch 8.1.1647: build error with GTK and hangulinput feature

Problem:    Build error with GTK and hangulinput feature, im_get_status()
            defined twice. (Dominique Pelle)
Solution:   Adjust im_get_status(). (closes #4628)
diff --git a/src/hangulin.c b/src/hangulin.c
index e08fe63..337ea84 100644
--- a/src/hangulin.c
+++ b/src/hangulin.c
@@ -404,11 +404,13 @@
     hangul_input_clear();
 }
 
+#if (!defined(FEAT_XIM) && !defined(FEAT_GUI_GTK)) || defined(PROTO)
     int
 im_get_status(void)
 {
     return hangul_input_state_get();
 }
+#endif
 
     void
 hangul_input_state_toggle(void)
diff --git a/src/mbyte.c b/src/mbyte.c
index 9c03f08..94adddf 100644
--- a/src/mbyte.c
+++ b/src/mbyte.c
@@ -5848,6 +5848,11 @@
     int
 im_get_status(void)
 {
+#  ifdef FEAT_HANGULIN
+    if (hangul_input_state_get())
+	return TRUE;
+#  endif
+
 #  ifdef FEAT_EVAL
     if (USE_IMSTATUSFUNC)
 	return call_imstatusfunc();
diff --git a/src/version.c b/src/version.c
index 52bce3b..5cf7da3 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1647,
+/**/
     1646,
 /**/
     1645,