Define HAVE_STDIO_H.

SDL can operate without stdio.h, but Lime requires it in most cases.

project/Build.xml

@@ -247,6 +247,7 @@
 			<compilerflag value="-D__IPHONEOS__" if="ios || tvos" />
 			<compilerflag value="-D__APPLETVOS__" if="tvos" />
 			<compilerflag value="-DAPPLETV" if="tvos" />
+			<compilerflag value="-DHAVE_STDIO_H" unless="windows" />
 
 			<file name="src/backend/sdl/SDLApplication.cpp" />
 			<file name="src/backend/sdl/SDLGamepad.cpp" />

project/src/backend/sdl/SDLSystem.cpp

@@ -578,6 +578,8 @@ namespace lime {
 			{
 				#ifdef HAVE_STDIO_H
 				return ((SDL_RWops*)handle)->hidden.stdio.fp;
+				#else
+				#error Lime requires HAVE_STDIO_H
 				#endif
 			}
 			case SDL_RWOPS_JNIFILE: