Fix tests on Windows, update sprites

The SDL.h include is only valid for macOS because of memset_pattern4, on
Windows it is not required.

The character and weapon sprites have been updated.

__tests__/src/packages/game/data.test.c

@@ -1,4 +1,6 @@
+#if defined IZ_MACOS
 #include <SDL.h>
+#endif
 #include <bdd-for-c.h>
 #include <stdinc/IZ_stdlib.mock.h>
 #include <common/IZ_common.h>

__tests__/src/packages/game/input.test.c

@@ -1,4 +1,6 @@
+#if defined IZ_MACOS
 #include <SDL.h>
+#endif
 #include <bdd-for-c.h>
 #include <subprojects/SDL/SDL_keyboard.mock.h>
 #include <subprojects/SDL/SDL_joystick.mock.h>