native frameworks: 64-bit compile issues

- Fix format (print/scanf)
- Suppress unused argument warning messages (bonus)

Change-Id: I05c7724d2aba6da1e82a86000e11f3a8fef4e728
diff --git a/opengl/libagl/light.cpp b/opengl/libagl/light.cpp
index fafec3f..479bf7e 100644
--- a/opengl/libagl/light.cpp
+++ b/opengl/libagl/light.cpp
@@ -105,7 +105,7 @@
     c->lighting.shadeModel = GL_SMOOTH;
 }
 
-void ogles_uninit_light(ogles_context_t* c)
+void ogles_uninit_light(ogles_context_t* /*c*/)
 {
 }
 
@@ -285,7 +285,7 @@
     invalidate_lighting(c);
 }
 
-void lightVertexNop(ogles_context_t*, vertex_t* v)
+void lightVertexNop(ogles_context_t*, vertex_t* /*v*/)
 {
     // we should never end-up here
 }