Try to fix Mac build.

Author: jcsteh

src/coreUtils.cpp

@@ -9,8 +9,8 @@
 
 #include <string>
 
-#include "config.h"
 #include "osara.h"
+#include "config.h"
 
 using namespace std;
 

src/osara.h

@@ -8,6 +8,8 @@
 #ifndef _OSARA_H
 #define _OSARA_H
 
+// We need to include sstream first to avoid issues with SWELL.
+#include <sstream>
 #ifdef _WIN32
 # include <windows.h>
 #else
@@ -17,10 +19,9 @@
 # include <windows.h>
 # pragma clang diagnostic pop
 #endif
+#include <string>
 #include <functional>
 #include <memory>
-#include <string>
-#include <sstream>
 
 #define REAPERAPI_MINIMAL
 #define REAPERAPI_WANT_GetLastTouchedTrack