prepare release v3.2.0RC1

* PHP-7.2 compatibility
* Fixed gh-issue #73: build fails with libidn and libidn2
+ Added brotli compression support
+ Implemented gh-issue #58: Notify observers before any request is built

package.xml

@@ -31,18 +31,21 @@ https://mdref.m6w6.name/http
   <email>mike@php.net</email>
   <active>yes</active>
  </lead>
- <date>2017-04-04</date>
+ <date>2018-04-09</date>
  <version>
-  <release>3.1.1dev</release>
-  <api>3.1.0</api>
+  <release>3.2.0RC1</release>
+  <api>3.2.0</api>
  </version>
  <stability>
-  <release>stable</release>
-  <api>stable</api>
+  <release>beta</release>
+  <api>beta</api>
  </stability>
  <license uri="http://copyfree.org/content/standard/licenses/2bsd/license.txt">BSD-2-Clause</license>
  <notes><![CDATA[
-* Fix gh-issue #65: http\Client::enqueue(): Could not enqueue request: The easy handle is already added to a multi handle (@rcanavan, Mike)
+* PHP-7.2 compatibility
+* Fixed gh-issue #73: build fails with libidn and libidn2
++ Added brotli compression support
++ Implemented gh-issue #58: Notify observers before any request is built
 ]]></notes>
  <contents>
   <dir name="/">

src/php_http_buffer.c

@@ -117,9 +117,11 @@ PHP_HTTP_BUFFER_API size_t php_http_buffer_append(php_http_buffer_t *buf,
 	) {
 		return PHP_HTTP_BUFFER_NOMEM;
 	}
-	memcpy(buf->data + buf->used, append, append_len);
-	buf->used += append_len;
-	buf->free -= append_len;
+	if (append_len) {
+		memcpy(buf->data + buf->used, append, append_len);
+		buf->used += append_len;
+		buf->free -= append_len;
+	}
 	return append_len;
 }
 
@@ -147,7 +149,9 @@ PHP_HTTP_BUFFER_API char *php_http_buffer_data(const php_http_buffer_t *buf,
 		char **into, size_t *len)
 {
 	char *copy = ecalloc(1, buf->used + 1);
-	memcpy(copy, buf->data, buf->used);
+	if (buf->data) {
+		memcpy(copy, buf->data, buf->used);
+	}
 	if (into) {
 		*into = copy;
 	}