frontend update + fixes

build_web.sh

@@ -4,9 +4,7 @@ echo "-- Preparing WWW files --"
 
 [[ -e html ]] && rm -r html
 
-cd front-end
-ESP_PROD=1 sh ./build.sh
-cd ..
+ESP_PROD=1 front-end/build.sh
 
 echo "Copying from submodule..."
 

showmem.php

@@ -23,7 +23,7 @@ foreach ($pieces as $piece) {
   }
 }
 
-if ($argv[1]) {
+if (isset($argv[1])) {
   $key = $argv[1];
   uasort($table, function($a, $b) use ($key) {
     $av = $a[$key] ?? 0;