Guard against NPE while unboxing possible null Boolean

Change-Id: I24bad04f2400fa5f9232f18385f3a76280b022fc

src/main/java/com/googlesource/gerrit/plugins/importer/ReplayInlineCommentsStep.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/importer/ReplayInlineCommentsStep.java b/src/main/java/com/googlesource/gerrit/plugins/importer/ReplayInlineCommentsStep.java
index 79d6370..07293a6 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/importer/ReplayInlineCommentsStep.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/importer/ReplayInlineCommentsStep.java
@@ -197,7 +197,7 @@
                 c.side == Side.PARENT ? (short) 0 : (short) 1,
                 c.message,
                 serverId,
-                c.unresolved);
+                c.unresolved == null ? false : c.unresolved);
       } else if (parent != null) {
         e.parentUuid = parent;
       }