patch for fix vim's problem: multi-byte is treated as K_SPECIAL

Index: src/term.c
===================================================================
--- src/term.c	(revision 1318)
+++ src/term.c	(working copy)
@@ -5152,7 +5152,7 @@
 
 #ifdef FEAT_MBYTE
 	/* skip multibyte char correctly */
-	for (i = (*mb_ptr2len)(src); i > 0; --i)
+	if ((i = (*mb_ptr2len)(src)) == 1)
 #endif
 	{
 	    /*
@@ -5177,7 +5177,13 @@
 	    else
 		result[dlen++] = *src;
 	    ++src;
+#ifdef FEAT_MBYTE
+	} else {
+	    mch_memmove(result + dlen, src, i);
+	    dlen += i;
+	    src += i;
 	}
+#endif
     }
     result[dlen] = NUL;