Fix reduce usage

CHANGES

@@ -1735,3 +1735,6 @@
 * Add 'New Apps' section to Appstore view
 * Fix issue where graphs of some apps were not appearing
 
+[4.3.5]
+* Show swap in graphs
+

src/system.js

@@ -102,7 +102,7 @@ function getMemory(callback) {
     assert.strictEqual(typeof callback, 'function');
 
     const stdout = safe.child_process.execSync('swapon --noheadings --raw --bytes --show=SIZE', { encoding: 'utf8' });
-    const swap = !stdout ? 0 : stdout.split('\n').reduce((acc, cur) => acc + (parseInt(cur, 0) || 0));
+    const swap = !stdout ? 0 : stdout.trim().split('\n').map(x => parseInt(x, 10) || 0).reduce((acc, cur) => acc + cur);
 
     callback(null, {
         memory: os.totalmem(),