Additional log output for artInvokeCommon code == NULL.

Motivated by an error regarding a possibly corrupted dex file.

Change-Id: I70f8e15151d0c1f00ea2d289a1b43cd88a199290
diff --git a/src/oat/runtime/support_invoke.cc b/src/oat/runtime/support_invoke.cc
index 95dab98..4669688 100644
--- a/src/oat/runtime/support_invoke.cc
+++ b/src/oat/runtime/support_invoke.cc
@@ -38,7 +38,12 @@
   const void* code = method->GetCode();
 
   // When we return, the caller will branch to this address, so it had better not be 0!
-  CHECK(code != NULL) << PrettyMethod(method);
+  if (UNLIKELY(code == NULL)) {
+      MethodHelper mh(method);
+      LOG(FATAL) << "Code was NULL in method: " << PrettyMethod(method)
+                 << " location: " << mh.GetDexFile().GetLocation();
+  }
+
 
   uint32_t method_uint = reinterpret_cast<uint32_t>(method);
   uint64_t code_uint = reinterpret_cast<uint32_t>(code);