Don't load classes when we're checking for them

This causes a ton of lag and doesn't seem to ever work
Addresses #124

ProtocolLib/src/main/java/com/comphenix/protocol/reflect/compiler/StructureCompiler.java

@@ -147,6 +147,8 @@ public final class StructureCompiler {
 	private static String COMPILED_CLASS = PACKAGE_NAME + "/CompiledStructureModifier";
 	private static String FIELD_EXCEPTION_CLASS = "com/comphenix/protocol/reflect/FieldAccessException";
 
+	public static boolean attemptClassLoad = false;
+
 	/**
 	 * Construct a structure compiler.
 	 * @param loader - main class loader.
@@ -169,6 +171,12 @@ public final class StructureCompiler {
 			return true;
 		}
 
+		if (! attemptClassLoad) {
+			return false;
+		}
+
+		// This causes a ton of lag and doesn't seem to work
+
 		try {
 			String className = getCompiledName(source);