Strip empty else-statements

Fixes #91

src/JS.php

@@ -307,6 +307,16 @@ class JS extends Minify
          */
         $content = preg_replace('/(for\([^;]*;[^;]*;[^;\{]*\));(\}|$)/s', '\\1;;\\2', $content);
 
+        /*
+         * We also can't strip empty else-statements. Even though they're
+         * useless and probably shouldn't be in the code in the first place, we
+         * shouldn't be stripping the `;` that follows it as it breaks the code.
+         * We can just remove those useless else-statements completely.
+         *
+         * @see https://github.com/matthiasmullie/minify/issues/91
+         */
+        $content = preg_replace('/else;/s', '', $content);
+
         /*
          * We also don't really want to terminate statements followed by closing
          * curly braces (which we've ignored completely up until now) or end-of-

tests/js/JSTest.php

@@ -659,6 +659,12 @@ BUG
             "for(;;ja||(ja=!0)){}",
         );
 
+        // https://github.com/matthiasmullie/minify/issues/91
+        $tests[] = array(
+            'if(true){if(true)console.log("test")else;}',
+            'if(!0){if(!0)console.log("test")}',
+        );
+
         return $tests;
     }
 }