Fix lint issues.

src/assembler-ia32.cc

Index: src/assembler-ia32.cc
===================================================================
--- src/assembler-ia32.cc	(revision 343)
+++ src/assembler-ia32.cc	(working copy)
@@ -2036,9 +2036,9 @@
   reloc_info_writer.Write(&rinfo);
 }
 
-void Assembler::WriteInternalReference(int position, Label &bound_label) {
+void Assembler::WriteInternalReference(int position, const Label& bound_label) {
   ASSERT(bound_label.is_bound());
-  ASSERT(0 <= position && position + (int)sizeof(uint32_t) <= pc_offset());
+  ASSERT(0 <= position && position + sizeof(uint32_t) <= pc_offset());
   ASSERT(long_at(position) == 0);  // only initialize once!
 
   uint32_t label_loc = reinterpret_cast<uint32_t>(addr_at(bound_label.pos()));