Do not redefine bit variable

tree.c

@@ -96,6 +96,7 @@ struct tree *create_tree(FILE *file)
 static int write_entry(struct BIT_BUFFER *bitbuf, struct tree *parent,
 					   unsigned char c)
 {
+	int bit = 0;
 	while (parent != NULL) {
 		struct tree *left, *right;
 
@@ -104,27 +105,27 @@ static int write_entry(struct BIT_BUFFER *bitbuf, struct tree *parent,
 
 		if (c != 0) {
 			if (left->ch == c) {
-				int bit = 0;
+				bit = 0;
 				bb_write(bitbuf, &bit, 1);
 				break;
 			} else if (right->ch == c) {
-				int bit = 1;
+				bit = 1;
 				bb_write(bitbuf, &bit, 1);
 				break;
 			}
 		} else {
 			if (left->left == NULL) {
-				int bit = 0;
+				bit = 0;
 				bb_write(bitbuf, &bit, 1);
 				break;
 			} else if (right->ch == c) {
-				int bit = 1;
+				bit = 1;
 				bb_write(bitbuf, &bit, 1);
 				break;
 			}
 		}
 
-		int bit = 0;
+		bit = 0;
 		bb_write(bitbuf, &bit, 1);
 
 		parent = left;