fix mingw32 compilation

src/curl_handle.cpp

@@ -23,6 +23,7 @@
 #ifdef HAVE_CURL_CURL_H
 
 #include <cstdlib>
+#include <pthread.h>
 
 namespace
 {

src/lastfm.h

@@ -28,6 +28,7 @@
 #ifdef HAVE_CURL_CURL_H
 
 #include <memory>
+#include <pthread.h>
 
 #include "lastfm_service.h"
 #include "screen.h"

src/lyrics.h

@@ -21,6 +21,8 @@
 #ifndef _LYRICS_H
 #define _LYRICS_H
 
+#include <pthread.h>
+
 #include "ncmpcpp.h"
 #include "mpdpp.h"
 #include "screen.h"