added libidn2 to .travis.yml

.travis.yml

@@ -6,4 +6,4 @@ compiler:
 script: ./autogen.sh && ./configure && make && make check && make distcheck
 before_install:
   - sudo apt-get -qq update
-  - sudo apt-get -q install autoconf automake autopoint libtool gettext
+  - sudo apt-get -q install autoconf automake autopoint libtool gettext libidn2-0 libidn2-0-dev

src/psl2c.c

@@ -70,7 +70,6 @@ static void _add_punycode_if_needed(_psl_vector_t *v)
 			char *asc = NULL;
 			int rc;
 
-
 			if ((rc = idn2_lookup_u8((uint8_t *)e->label_buf, (uint8_t **)&asc, 0)) == IDN2_OK) {
 				// fprintf(stderr, "idn2 '%s' -> '%s'\n", e->label_buf, asc);
 				_suffix_init(&suffix, asc, strlen(asc));