Stop loading subview in stopAllLoading

The main webview is stopped twice instead of stopping
the subview loading. Correcting this cut and paste error.

Change-Id: Ic12c7219d222d42f59e27f1cda0cd65a003b41ca
diff --git a/src/com/android/browser/TabControl.java b/src/com/android/browser/TabControl.java
index 993cd11..150ece0 100644
--- a/src/com/android/browser/TabControl.java
+++ b/src/com/android/browser/TabControl.java
@@ -571,7 +571,7 @@
             }
             final WebView subview = t.getSubWebView();
             if (subview != null) {
-                webview.stopLoading();
+                subview.stopLoading();
             }
         }
     }