proper check for if the config has been initialized

Author: J4C0B3Y

core/src/main/java/net/j4c0b3y/api/config/StaticConfig.java

@@ -139,7 +139,8 @@ public void load() {
             relocate();
 
             // If fields are empty, perform the initialization.
-            if (fields.isEmpty()) {
+            if (sections.isEmpty()) {
+                sections.put("", new LinkedHashSet<>());
                 initialize(getClass(), "");
             }