Config: moved check of unknown config sections after extension loadin…

…g in Compiler

Nette/Config/Compiler.php

@@ -113,14 +113,14 @@ public function processParameters()
 
 	public function processExtensions()
 	{
+		foreach ($this->extensions as $name => $extension) {
+			$extension->loadConfiguration();
+		}
+
 		if ($extra = array_diff_key($this->config, self::$reserved, $this->extensions)) {
 			$extra = implode("', '", array_keys($extra));
 			throw new Nette\InvalidStateException("Found sections '$extra' in configuration, but corresponding extensions are missing.");
 		}
-
-		foreach ($this->extensions as $name => $extension) {
-			$extension->loadConfiguration();
-		}
 	}