optimize rendering

ko.c

@@ -206,12 +206,14 @@ transko(Im *im, Rune c)
 		sputr(&e.s, c);
 		return e;
 	}
+
 	e.eat = 1;
 	last = slastr(&im->pre);
 	if(last == 0){
 		sputr(&e.next, jm);
 		return e;
 	}
+
 	if(!issyl(last)){
 		ci = Choidx(last);
 		ji = Jungidx(jm);
@@ -232,7 +234,9 @@ transko(Im *im, Rune c)
 		sputr(&e.next, jm);
 		return e;
 	}
+
 	decompose(last, &ci, &ji, &joi);
+
 	if(joi == 0){
 		ni = Jongidx(jm);
 		if(ni > 0){
@@ -251,6 +255,7 @@ transko(Im *im, Rune c)
 			}
 		}
 	}
+
 	if(joi > 0){
 		comb = combine(cjong, nelem(cjong), jong[joi], jm);
 		if(comb){
@@ -281,6 +286,7 @@ transko(Im *im, Rune c)
 			}
 		}
 	}
+
 	e.s = im->pre;
 	sputr(&e.next, jm);
 	return e;