Fix Scoping of proc type decls

examples/stb_image.odin

@@ -0,0 +1,30 @@
+type Bitmap: struct {
+	width, height: i32,
+	comp: i32,
+	data: []u8,
+}
+
+make_bitmap :: proc(filename: string) -> Bitmap {
+	stbi_load :: proc(filename: ^u8, x, y, comp: ^i32, req_comp: i32) -> ^u8 #foreign
+
+	c_buf: [1024]u8;
+	bytes :=  filename as []byte;
+	str_len := copy(c_buf[:], bytes);
+
+	b: Bitmap;
+	pixels := stbi_load(^c_buf[0], ^b.width, ^b.height, ^b.comp, 4);
+	len := (b.width*b.height*b.comp) as int;
+	b.data = pixels[:len];
+
+	return b;
+}
+
+destroy_bitmap :: proc(b: ^Bitmap) {
+	stbi_image_free :: proc(retval_from_stbi_load: rawptr) #foreign
+
+	stbi_image_free(^b.data[0]);
+	b.data   = b.data[:0];
+	b.width  = 0;
+	b.height = 0;
+	b.comp   = 0;
+}