Find type, add import/spelling hint.

Bug: N/A
Test: N/A
Change-Id: Ibf655868a41ca3d0d1061584ce1c4a919c6b4cc7
diff --git a/AST.cpp b/AST.cpp
index 4eba768..31fe190 100644
--- a/AST.cpp
+++ b/AST.cpp
@@ -214,7 +214,8 @@
                 if (nextType == nullptr) {
                     std::cerr << "ERROR: Failed to lookup type '"
                               << nextRef->getLookupFqName().string() << "' at "
-                              << nextRef->location() << "\n";
+                              << nextRef->location()
+                              << " (is it imported and spelled correctly?)\n";
                     return UNKNOWN_ERROR;
                 }
                 nextRef->set(nextType);