NetRCCredentialsProvider should return false if any item is missing

Change-Id: I894d1621aaccd71dfe100fe83a1bd9d50a1e0808

org.eclipse.jgit/src/org/eclipse/jgit/transport/ChainingCredentialsProvider.java

@@ -127,11 +127,4 @@ public class ChainingCredentialsProvider extends CredentialsProvider {
 		}
 		return false;
 	}
-
-	private boolean isAnyNull(CredentialItem... items) {
-		for (CredentialItem i : items)
-			if (i == null)
-				return true;
-		return false;
-	}
 }

org.eclipse.jgit/src/org/eclipse/jgit/transport/CredentialsProvider.java

@@ -80,6 +80,20 @@ public abstract class CredentialsProvider {
 		defaultProvider = p;
 	}
 
+	/**
+	 * @param items
+	 *            credential items to check
+	 * @return {@code true} if any of the passed items is null, {@code false}
+	 *         otherwise
+	 * @since 4.2
+	 */
+	protected static boolean isAnyNull(CredentialItem... items) {
+		for (CredentialItem i : items)
+			if (i == null)
+				return true;
+		return false;
+	}
+
 	/**
 	 * Check if the provider is interactive with the end-user.
 	 *

org.eclipse.jgit/src/org/eclipse/jgit/transport/NetRCCredentialsProvider.java

@@ -105,12 +105,11 @@ public class NetRCCredentialsProvider extends CredentialsProvider {
 			throw new UnsupportedCredentialItem(uri, i.getClass().getName()
 					+ ":" + i.getPromptText()); //$NON-NLS-1$
 		}
-		return true;
+		return !isAnyNull(items);
 	}
 
 	@Override
 	public boolean isInteractive() {
 		return false;
 	}
-
 }