Consolidate curFrame fields in thread storage

We ended up with two locations in the Thread structure for saved
Dalvik frame pointer.  This change consolidates them.

Change-Id: I78f288e4e57e232f29663be930101e775bfe370f
diff --git a/vm/alloc/Copying.cpp b/vm/alloc/Copying.cpp
index fca8ae7..f36fc89 100644
--- a/vm/alloc/Copying.cpp
+++ b/vm/alloc/Copying.cpp
@@ -1526,7 +1526,7 @@
     bool first = true;
 #endif
 
-    framePtr = (const u4 *)thread->curFrame;
+    framePtr = (const u4 *)thread->interpSave.curFrame;
     while (framePtr != NULL) {
         const StackSaveArea *saveArea;
         const Method *method;
@@ -1752,7 +1752,7 @@
     Object *obj;
 
     saveArea = NULL;
-    framePtr = (const u4 *)thread->curFrame;
+    framePtr = (const u4 *)thread->interpSave.curFrame;
     for (; framePtr != NULL; framePtr = saveArea->prevFrame) {
         saveArea = SAVEAREA_FROM_FP(framePtr);
         method = (Method *)saveArea->method;
diff --git a/vm/alloc/Visit.cpp b/vm/alloc/Visit.cpp
index b329595..7f949f6 100644
--- a/vm/alloc/Visit.cpp
+++ b/vm/alloc/Visit.cpp
@@ -87,7 +87,7 @@
     assert(thread != NULL);
     u4 threadId = thread->threadId;
     const StackSaveArea *saveArea;
-    for (u4 *fp = (u4 *)thread->curFrame;
+    for (u4 *fp = (u4 *)thread->interpSave.curFrame;
          fp != NULL;
          fp = (u4 *)saveArea->prevFrame) {
         Method *method;