Fix build (broken method signature).

Change-Id: I69b11abc573ecf55912f6a539257e817330006e0
diff --git a/src/object.cc b/src/object.cc
index 90342ff..0cf2aa8 100644
--- a/src/object.cc
+++ b/src/object.cc
@@ -515,7 +515,7 @@
 }
 
 // Find the lowest-address native safepoint pc for a given dex pc
-uint32_t AbstractMethod::ToFirstNativeSafepointPc(const uintptr_t dex_pc) const {
+uintptr_t AbstractMethod::ToFirstNativeSafepointPc(const uint32_t dex_pc) const {
 #if !defined(ART_USE_LLVM_COMPILER)
   const uint32_t* mapping_table = GetPcToDexMappingTable();
   if (mapping_table == NULL) {