Fixed maybe used uninitialized

GCC 4.9 found that ops[1].op maybe uninitialized in
ArmMir2Lir::GetEasyMultiplyTwoOps, but used unconditionally
in ArmMir2Lir::GenEasyMultiplyTwoOps

Change-Id: Icf8fdf3b888bd54ccb252e95637774889c7a0f9d
diff --git a/compiler/dex/quick/arm/int_arm.cc b/compiler/dex/quick/arm/int_arm.cc
index 2a4d27b..ef26323 100644
--- a/compiler/dex/quick/arm/int_arm.cc
+++ b/compiler/dex/quick/arm/int_arm.cc
@@ -637,6 +637,9 @@
     return true;
   }
 
+  ops[1].op = kOpInvalid;
+  ops[1].shift = 0;
+
   return false;
 }