MIPS: Fix '[debug] implement intuitive semantics for stepping over await call.'

src/mips/builtins-mips.cc

Index: src/mips/builtins-mips.cc
diff --git a/src/mips/builtins-mips.cc b/src/mips/builtins-mips.cc
index 54377088e74cc6d4e427e381db6ff5370bc86d71..19de5d953f56c4b831afdfa7330666257f4c1d3b 100644
--- a/src/mips/builtins-mips.cc
+++ b/src/mips/builtins-mips.cc
@@ -854,7 +854,7 @@ void Builtins::Generate_ResumeGeneratorTrampoline(MacroAssembler* masm) {
       ExternalReference::debug_suspended_generator_address(masm->isolate());
   __ li(t1, Operand(debug_suspended_generator));
   __ lw(t1, MemOperand(t1));
-  __ Branch(&prepare_step_in_suspended_generator, eq, t1, Operand(zero_reg));
+  __ Branch(&prepare_step_in_suspended_generator, eq, a1, Operand(t1));
   __ bind(&stepping_prepared);
 
   // Push receiver.