BUGFIX: close string with smart_str_0()

ext/soap/php_http.c

@@ -163,6 +163,7 @@ int send_http_soap_request(zval *this_ptr, xmlDoc *doc, char *soapaction TSRMLS_
 			if(zend_hash_find(Z_OBJPROP_P(this_ptr), "_password", sizeof("_password"), (void **)&password) == SUCCESS) {
 				smart_str_appendl(&auth, Z_STRVAL_PP(password), Z_STRLEN_PP(password));
 			}
+			smart_str_0(&auth);
 			buf = php_base64_encode(auth.c, auth.len, &len);
 			smart_str_append_const(&soap_headers, "Authorization: Basic ");
 			smart_str_appendl(&soap_headers, buf, len);
@@ -194,6 +195,7 @@ int send_http_soap_request(zval *this_ptr, xmlDoc *doc, char *soapaction TSRMLS_
 		smart_str_append_const(&soap_headers, "\r\n");
 
 		smart_str_appendl(&soap_headers, buf, buf_size);
+		smart_str_0(&soap_headers);
 
 		err = php_stream_write(stream, soap_headers.c, soap_headers.len);
 		if(err != soap_headers.len) {

ext/soap/soap.c

@@ -2215,6 +2215,7 @@ static void function_to_string(sdlFunctionPtr function, smart_str *buf)
 		}
 	}
 	smart_str_appendc(buf, ')');
+	smart_str_0(buf);
 }
 
 static void type_to_string(sdlTypePtr type, smart_str *buf, int level)
@@ -2257,6 +2258,7 @@ static void type_to_string(sdlTypePtr type, smart_str *buf, int level)
 		smart_str_appendl(buf, ";\n", 2);
 	}
 	smart_str_free(&spaces);
+	smart_str_0(buf);
 }
 
 /* Deletes */