small fix for HISTFILESIZE

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/libbb/lineedit.c b/libbb/lineedit.c
index 095ccfb..0563e6d 100644
--- a/libbb/lineedit.c
+++ b/libbb/lineedit.c
@@ -1412,6 +1412,7 @@
 		 * load them */
 		st_temp = new_line_input_t(state->flags);
 		st_temp->hist_file = state->hist_file;
+		st_temp->max_history = state->max_history;
 		load_history(st_temp);
 
 		/* write out temp file and replace hist_file atomically */