Check for empty repetitions.

src/regexp-macro-assembler-ia32.h

Index: src/regexp-macro-assembler-ia32.h
diff --git a/src/regexp-macro-assembler-ia32.h b/src/regexp-macro-assembler-ia32.h
index ecf0326c6b4040c4e51f0bc24bf3aad7b554c74e..2f716d6ca7e0946427e894080491ddfc70ea7777 100644
--- a/src/regexp-macro-assembler-ia32.h
+++ b/src/regexp-macro-assembler-ia32.h
@@ -86,6 +86,7 @@ class RegExpMacroAssemblerIA32: public RegExpMacroAssembler {
   virtual void GoTo(Label* label);
   virtual void IfRegisterGE(int reg, int comparand, Label* if_ge);
   virtual void IfRegisterLT(int reg, int comparand, Label* if_lt);
+  virtual void IfRegisterEqPos(int reg, Label* if_eq);
   virtual IrregexpImplementation Implementation();
   virtual void LoadCurrentCharacter(int cp_offset,
                                     Label* on_end_of_input,