updated for version 7.3.859
Problem:    'ambiwidth' must be set by the user.
Solution:   Detects East Asian ambiguous width (UAX #11) state of the terminal
            at the start-up time and 'ambiwidth' accordingly.  (Hayaki Saito)
diff --git a/src/term.h b/src/term.h
index cc9f8ac..22b60b1 100644
--- a/src/term.h
+++ b/src/term.h
@@ -83,10 +83,11 @@
 #ifdef FEAT_VERTSPLIT
     KS_CSV,	/* scroll region vertical */
 #endif
-    KS_OP	/* original color pair */
+    KS_OP,	/* original color pair */
+    KS_U7	/* request cursor position */
 };
 
-#define KS_LAST	    KS_OP
+#define KS_LAST	    KS_U7
 
 /*
  * the terminal capabilities are stored in this array
@@ -158,6 +159,7 @@
 #define T_CEI	(term_str(KS_CEI))	/* end insert mode */
 #define T_CRV	(term_str(KS_CRV))	/* request version string */
 #define T_OP	(term_str(KS_OP))	/* original color pair */
+#define T_U7	(term_str(KS_U7))	/* request cursor position */
 
 #define TMODE_COOK  0	/* terminal mode for external cmds and Ex mode */
 #define TMODE_SLEEP 1	/* terminal mode for sleeping (cooked but no echo) */