Support termcap "ec"(erase_chars).

This fixed scroll-and-wipe-screen problem,
for example, using /usr/bin/vi(4.x-RELEASE).
# There is "ec" directive in "kterm" termcap.
# But, kterm-6.2.0_4 or former does not support "ec"(erase_chars).

PORTREVISION bumped.

Pointed by:	KFB03633@nifty.ne.jp

japanese/kterm/Makefile

@@ -7,7 +7,7 @@
 
 PORTNAME=	kterm
 PORTVERSION=	6.2.0
-PORTREVISION=	4
+PORTREVISION=	5
 CATEGORIES=	japanese x11
 MASTER_SITES=	${MASTER_SITE_PORTS_JP} \
 		${MASTER_SITE_XCONTRIB} \

japanese/kterm/files/patch-ac

@@ -11,3 +11,16 @@
  extern fd_set Select_mask;
  extern fd_set X_mask;
  extern fd_set pty_mask;
+@@ -1837,6 +1837,12 @@
+ 			parsestate = groundtable;
+ 			break;
+ 
++                 case CASE_ECH:
++                        /* ECH */
++                        ClearRightN(screen, param[0] < 1 ? 1 : param[0]);
++                        parsestate = groundtable;
++                        break;
++
+ 		 case CASE_IL:
+ 			/* IL */
+ 			if((row = param[0]) < 1)