clean up declarations in src/palette.c

include/blend_palette.h

@@ -0,0 +1,12 @@
+#ifndef GUARD_BLEND_PALETTE_H
+#define GUARD_BLEND_PALETTE_H
+
+// Exported type declarations
+
+// Exported RAM declarations
+
+// Exported ROM declarations
+
+void BlendPalette(u16, u16, u8, u16);
+
+#endif //GUARD_BLEND_PALETTE_H