Fix "slow startup" bug, bump version to 0.2.5

Cargo.lock

@@ -1427,7 +1427,7 @@ dependencies = [
 
 [[package]]
 name = "mpd_info_screen"
-version = "0.2.4"
+version = "0.2.5"
 dependencies = [
  "ggez",
  "image",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "mpd_info_screen"
-version = "0.2.4"
+version = "0.2.5"
 edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

README.md

@@ -9,7 +9,7 @@ counter, and the filename currently being played
 
 # Usage
 
-    mpd_info_screen 0.2.4
+    mpd_info_screen 0.2.5
     
     USAGE:
         mpd_info_screen [FLAGS] [OPTIONS] <host> [port]

src/mpd_handler.rs

@@ -319,7 +319,7 @@ impl MPDHandler {
     }
 
     pub fn is_art_data_ready(&self) -> bool {
-        self.art_data.len() == self.art_data_size
+        self.art_data_size != 0 && self.art_data.len() == self.art_data_size
     }
 
     pub fn get_art_data(&self) -> &[u8] {