WEBOS: Add WEBOS define

Using SDL_INIT_VIDEO flag for WebOS because without it the application
won't start.

backends/platform/sdl/sdl.cpp

@@ -214,6 +214,11 @@ void OSystem_SDL::initSDL() {
 		if (ConfMan.hasKey("disable_sdl_parachute"))
 			sdlFlags |= SDL_INIT_NOPARACHUTE;
 		
+		#ifdef WEBOS
+		// WebOS needs this flag or otherwise the application won't start
+		sdlFlags |= SDL_INIT_VIDEO;
+		#endif
+
 		// Initialize SDL (SDL Subsystems are initiliazed in the corresponding sdl managers)
 		if (SDL_Init(sdlFlags) == -1)
 			error("Could not initialize SDL: %s", SDL_GetError());

configure

@@ -1670,6 +1670,7 @@ case $_host_os in
 	webos)
 		CXXFLAGS="$CXXFLAGS --sysroot=$WEBOS_PDK/arm-gcc/sysroot"
 		CXXFLAGS="$CXXFLAGS -I$WEBOS_PDK/include/SDL"
+		CXXFLAGS="$CXXFLAGS -DWEBOS"
 		LDFLAGS="$LDFLAGS -L$WEBOS_PDK/device/lib"
 		LDFLAGS="$LDFLAGS -Wl,--allow-shlib-undefined"
 		LIBS="$LIBS -lSDL -lpdl"