Fix test

tests/loop_while_test.aer

@@ -7,7 +7,7 @@ class Program {
 
 	public void main() {
 		int $a;
-		int $b = 2;
+		int $c = 2;
 		while($a = $this->test()) {
 			int $b = $a;
 			if($b == 6) {
@@ -17,7 +17,7 @@ class Program {
 			}
 			print("$b\n");
 		}
-		print("$b\n");
+		print("$c\n");
 	}
 
 }