Fix warnings.

Reviewers: clayborg

Subscribers: lldb-commits

Differential Revision: http://reviews.llvm.org/D11404

llvm-svn: 242913
diff --git a/lldb/tools/debugserver/source/MacOSX/MachVMMemory.cpp b/lldb/tools/debugserver/source/MacOSX/MachVMMemory.cpp
index d773009b..ecc8ac4 100644
--- a/lldb/tools/debugserver/source/MacOSX/MachVMMemory.cpp
+++ b/lldb/tools/debugserver/source/MacOSX/MachVMMemory.cpp
@@ -474,7 +474,7 @@
     {
         mach_vm_size_t curr_size = MaxBytesLeftInPage(task, curr_addr, data_count - total_bytes_read);
         mach_msg_type_number_t curr_bytes_read = 0;
-        vm_offset_t vm_memory = NULL;
+        vm_offset_t vm_memory = 0;
         m_err = ::mach_vm_read (task, curr_addr, curr_size, &vm_memory, &curr_bytes_read);
         
         if (DNBLogCheckLogBit(LOG_MEMORY))