Avoid compiler warnings due to extended enums.

src/libcharon/encoding/generator.c

@@ -423,7 +423,7 @@ METHOD(generator_t, generate_payload, void,
 	{
 		DBG2(DBG_ENC, "  generating rule %d %N",
 			 i, encoding_type_names, rules[i].type);
-		switch (rules[i].type)
+		switch ((int)rules[i].type)
 		{
 			case U_INT_4:
 			case U_INT_8:

src/libcharon/encoding/parser.c

@@ -390,7 +390,7 @@ METHOD(parser_t, parse_payload, status_t,
 		rule = &(this->rules[rule_number]);
 		DBG2(DBG_ENC, "  parsing rule %d %N",
 			 rule_number, encoding_type_names, rule->type);
-		switch (rule->type)
+		switch ((int)rule->type)
 		{
 			case U_INT_4:
 			{