Fix a use of uninitialized variable found by gcc-4.6.  I don't think this is a
real problem as we will only see an undefined value if the list has no instructions other than NOPs.

Change-Id: I055510831ca1c566e2daa2b4b2acbaa655fa735a
diff --git a/vm/compiler/codegen/arm/LocalOptimizations.cpp b/vm/compiler/codegen/arm/LocalOptimizations.cpp
index ffeaa57..b89437e 100644
--- a/vm/compiler/codegen/arm/LocalOptimizations.cpp
+++ b/vm/compiler/codegen/arm/LocalOptimizations.cpp
@@ -311,7 +311,7 @@
         u8 stopDefRegMask = thisLIR->defMask & ~ENCODE_MEM;
 
         int nextSlot = 0;
-        bool stopHere;
+        bool stopHere = false;
 
         /* Try to hoist the load to a good spot */
         for (checkLIR = PREV_LIR(thisLIR);