MIPS: Fix loading Float64 constants in turbofan.

src/mips/macro-assembler-mips.h

Index: src/mips/macro-assembler-mips.h
diff --git a/src/mips/macro-assembler-mips.h b/src/mips/macro-assembler-mips.h
index 62d3aa81d497ad4362b83458ddb6a2fdfd8bf10a..c6b00efa90608be4669d1404880be459eb44d80e 100644
--- a/src/mips/macro-assembler-mips.h
+++ b/src/mips/macro-assembler-mips.h
@@ -1665,6 +1665,7 @@ const Operand& rt = Operand(zero_reg), BranchDelaySlot bd = PROTECT
 
   bool generating_stub_;
   bool has_frame_;
+  bool has_double_zero_reg_set_;
   // This handle will be patched with the code object on installation.
   Handle<Object> code_object_;