reftable: don't check deadline on the first try

This helps debug stepping.

Change-Id: I020dafab4ffac75e6df0dbcde0ed4805c7867f72
Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>

org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/FileReftableStack.java

@@ -262,8 +262,13 @@ public class FileReftableStack implements AutoCloseable {
 		long max = 1000;
 		long delay = 0;
 		boolean success = false;
-		while (System.currentTimeMillis() < deadline) {
+
+		// Don't check deadline for the first 3 retries, so we can step with a
+		// debugger without worrying about deadlines.
+		int tries = 0;
+		while (tries < 3 || System.currentTimeMillis() < deadline) {
 			List<String> names = readTableNames();
+			tries++;
 			try {
 				reloadOnce(names);
 				success = true;