Fix lint error.

Change-Id: Iccba489098dd2a5b8796beefc781284006624f74
diff --git a/compiler/optimizing/code_generator_x86_64.cc b/compiler/optimizing/code_generator_x86_64.cc
index 285003d..3d99695 100644
--- a/compiler/optimizing/code_generator_x86_64.cc
+++ b/compiler/optimizing/code_generator_x86_64.cc
@@ -511,7 +511,7 @@
         CpuRegister(RSP), -static_cast<int32_t>(GetStackOverflowReservedBytes(kX86_64))));
     RecordPcInfo(nullptr, 0);
   }
-  
+
   for (int i = arraysize(kCoreCalleeSaves) - 1; i >= 0; --i) {
     if (allocated_registers_.ContainsCoreRegister(kCoreCalleeSaves[i])) {
       __ pushq(CpuRegister(kCoreCalleeSaves[i]));