lib/expat/ExpatParser: move InputStream overload to separate source file

Eliminate one unnecessary dependency for debug programs which don't
need the InputStream API.

Makefile.am

@@ -1577,6 +1577,7 @@ endif
 
 if ENABLE_EXPAT
 libplaylist_plugins_a_SOURCES += \
+	src/lib/expat/StreamExpatParser.cxx \
 	src/lib/expat/ExpatParser.cxx src/lib/expat/ExpatParser.hxx \
 	src/playlist/plugins/XspfPlaylistPlugin.cxx \
 	src/playlist/plugins/XspfPlaylistPlugin.hxx \

src/lib/expat/ExpatParser.cxx

@@ -19,7 +19,6 @@
 
 #include "config.h"
 #include "ExpatParser.hxx"
-#include "input/InputStream.hxx"
 #include "util/ASCII.hxx"
 
 #include <string.h>
@@ -31,23 +30,6 @@ ExpatParser::Parse(const char *data, size_t length, bool is_final)
 		throw ExpatError(parser);
 }
 
-void
-ExpatParser::Parse(InputStream &is)
-{
-	assert(is.IsReady());
-
-	while (true) {
-		char buffer[4096];
-		size_t nbytes = is.LockRead(buffer, sizeof(buffer));
-		if (nbytes == 0)
-			break;
-
-		Parse(buffer, nbytes, false);
-	}
-
-	Parse("", 0, true);
-}
-
 const char *
 ExpatParser::GetAttribute(const XML_Char **atts,
 			  const char *name)

src/lib/expat/StreamExpatParser.cxx

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2003-2017 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "ExpatParser.hxx"
+#include "input/InputStream.hxx"
+
+void
+ExpatParser::Parse(InputStream &is)
+{
+	assert(is.IsReady());
+
+	while (true) {
+		char buffer[4096];
+		size_t nbytes = is.LockRead(buffer, sizeof(buffer));
+		if (nbytes == 0)
+			break;
+
+		Parse(buffer, nbytes, false);
+	}
+
+	Parse("", 0, true);
+}