bug: fix panic if battery feature was disabled

src/clap.rs

@@ -392,7 +392,7 @@ use CPU (3) as the default instead.
         .arg(use_old_network_legend)
         .arg(whole_word);
 
-    let app = if cfg!(feature = "battery") {
+    if cfg!(feature = "battery") {
         let battery = Arg::new("battery")
             .long("battery")
             .help("Shows the battery widget.")
@@ -402,7 +402,5 @@ use CPU (3) as the default instead.
         app.arg(battery)
     } else {
         app
-    };
-
-    app
+    }
 }

src/options.rs

@@ -916,11 +916,13 @@ fn get_hide_table_gap(matches: &clap::ArgMatches, config: &Config) -> bool {
 }
 
 fn get_use_battery(matches: &clap::ArgMatches, config: &Config) -> bool {
-    if matches.is_present("battery") {
-        return true;
-    } else if let Some(flags) = &config.flags {
-        if let Some(battery) = flags.battery {
-            return battery;
+    if cfg!(feature = "battery") {
+        if matches.is_present("battery") {
+            return true;
+        } else if let Some(flags) = &config.flags {
+            if let Some(battery) = flags.battery {
+                return battery;
+            }
         }
     }
     false