Fix MSVC build

src/biome.cpp

@@ -24,6 +24,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "util/numeric.h"
 #include "main.h"
 #include "util/mathconstants.h"
+#include "porting.h"
 
 NoiseParams nparams_biome_def_heat(50, 50, v3f(500.0, 500.0, 500.0), 5349, 3, 0.70);
 NoiseParams nparams_biome_def_humidity(50, 50, v3f(500.0, 500.0, 500.0), 842, 3, 0.55);

src/convert_json.cpp

@@ -29,6 +29,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "settings.h"
 #include "version.h"
 #include "httpfetch.h"
+#include "porting.h"
 
 Json::Value                 fetchJsonValue(const std::string url,
 													struct curl_slist *chunk) {