Tidy up some C-isms.

Change-Id: I53b457cab9067369320457549071fc3e4c23c81b
diff --git a/src/class_linker.cc b/src/class_linker.cc
index 656032b..1edfe1a 100644
--- a/src/class_linker.cc
+++ b/src/class_linker.cc
@@ -1686,7 +1686,7 @@
       return *dex_files_[i];
     }
   }
-  CHECK(false) << "Failed to find DexFile for DexCache " << dex_cache->GetLocation()->ToModifiedUtf8();
+  LOG(FATAL) << "Failed to find DexFile for DexCache " << dex_cache->GetLocation()->ToModifiedUtf8();
   return *dex_files_[-1];
 }
 
@@ -1697,7 +1697,7 @@
       return dex_caches_[i];
     }
   }
-  CHECK(false) << "Failed to find DexCache for DexFile " << dex_file.GetLocation();
+  LOG(FATAL) << "Failed to find DexCache for DexFile " << dex_file.GetLocation();
   return NULL;
 }