8257709: C1: Double assignment in InstructionPrinter::print_stack

Reviewed-by: shade, chagedorn

Author: Sergey Platonov

src/hotspot/share/c1/c1_InstructionPrinter.cpp

@@ -240,7 +240,7 @@ void InstructionPrinter::print_stack(ValueStack* stack) {
     output()->cr();
     fill_to(start_position, ' ');
     output()->print("locks [");
-    for (int i = i = 0; i < stack->locks_size(); i++) {
+    for (int i = 0; i < stack->locks_size(); i++) {
       Value t = stack->lock_at(i);
       if (i > 0) output()->print(", ");
       output()->print("%d:", i);