Fix handle formatting for ATT Handle Notify
diff --git a/parser/att.c b/parser/att.c
index 5bff925..a1cd9af 100644
--- a/parser/att.c
+++ b/parser/att.c
@@ -512,7 +512,7 @@
 	uint16_t handle = btohs(htons(get_u16(frm)));
 
 	p_indent(level, frm);
-	printf("handle 0x%2.2x\n", handle);
+	printf("handle 0x%4.4x\n", handle);
 
 	p_indent(level, frm);
 	printf("value ");