small clippy changes - partialeq_to_none (#6)

Author: ZeWaka

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "dmi"
-version = "0.2.0"
+version = "0.2.1"
 edition = "2021"
 license = "MIT"
 description = "DMI library written in Rust. Provides helpers to manipulate and produce DMI format files."

src/dmi.rs

@@ -93,7 +93,7 @@ impl RawDmi {
 				_ => other_chunks.push(raw_chunk),
 			}
 		}
-		if chunk_ihdr == None {
+		if chunk_ihdr.is_none() {
 			return Err(error::DmiError::Generic(
 				"Failed to load DMI. Buffer end reached without finding an IHDR chunk.".to_string(),
 			));

src/dmi/icon.rs

@@ -229,7 +229,7 @@ impl Icon {
 				};
 			}
 
-			if dirs == None || frames == None {
+			if dirs.is_none() || frames.is_none() {
 				return Err(error::DmiError::Generic(format!(
 					"Error loading icon: state lacks essential settings. dirs: {:#?}. frames: {:#?}.",
 					dirs, frames