Fix a bunch more lint.

(If you ignore the compilers, we've got relatively little lint now. Fits on
a single screen.)

Change-Id: I51389002894d4fd8cf46f79d2bac57079322a030
diff --git a/src/compiler.cc b/src/compiler.cc
index aa465c3..8e24fc2 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -1298,7 +1298,7 @@
   }
 
   void SwitchToDexFile(size_t dex_file_index) {
-    CHECK (dex_file_index < dex_files_.size());
+    CHECK_LT(dex_file_index, dex_files_.size());
 
     const DexFile* dex_file = dex_files_[dex_file_index];
     CHECK(dex_file != NULL);