Include sys/stat.h for mkdir() on FreeBSD as well

Author: AMDmi3

src/physica.h

@@ -15,7 +15,7 @@
 #include "SDL/SDL_syswm.h"//Includes SDL window manager
 #endif
 
-#ifdef __linux__
+#if defined(__linux__) || defined(__FreeBSD__)
 #include <sys/stat.h>//Includes linux header
 #endif
 
@@ -2136,4 +2136,4 @@ void win32_init(int argc, char* argv[]){
 	SetClassLong(hwnd, GCL_HICON, (LONG) icon);
 }
 
-#endif
+#endif