util/proto: Convert validation routine to bool

This commit changes the signature of the protocol validation code to
bool and simplifies the validation steps.

src/util-proto-name.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2007-2010 Open Information Security Foundation
+/* Copyright (C) 2007-2020 Open Information Security Foundation
  *
  * You can copy, redistribute or modify this Program under the terms of
  * the GNU General Public License version 2 as published by the Free
@@ -93,17 +93,11 @@ void SCProtoNameInit()
  *          we have corresponding name entry for this number or not.
  *
  * \param proto Protocol number to be validated
- * \retval ret On success returns TRUE otherwise FALSE
+ * \retval ret On success returns true otherwise false
  */
-uint8_t SCProtoNameValid(uint16_t proto)
+bool SCProtoNameValid(uint16_t proto)
 {
-    uint8_t ret = FALSE;
-
-    if (proto <= 255 && known_proto[proto] != NULL) {
-        ret = TRUE;
-    }
-
-    return ret;
+    return (proto <= 255 && known_proto[proto] != NULL);
 }
 
 /**

src/util-proto-name.h

@@ -1,4 +1,4 @@
-/* Copyright (C) 2007-2010 Open Information Security Foundation
+/* Copyright (C) 2007-2020 Open Information Security Foundation
  *
  * You can copy, redistribute or modify this Program under the terms of
  * the GNU General Public License version 2 as published by the Free
@@ -34,7 +34,7 @@
  *  in /etc/protocols */
 extern char *known_proto[256];
 
-uint8_t SCProtoNameValid(uint16_t);
+bool SCProtoNameValid(uint16_t);
 void SCProtoNameInit(void);
 void SCProtoNameDeInit(void);