llvm-mc: Store MCSymbolData value as a pointer (to make MSVC happy).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80652 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCAssembler.cpp b/lib/MC/MCAssembler.cpp
index 21246cc..0afdf98 100644
--- a/lib/MC/MCAssembler.cpp
+++ b/lib/MC/MCAssembler.cpp
@@ -926,11 +926,11 @@
                                                        
 /* *** */
 
-MCSymbolData::MCSymbolData() : Symbol(*(const MCSymbol*)0) {}
+MCSymbolData::MCSymbolData() : Symbol(0) {}
 
 MCSymbolData::MCSymbolData(const MCSymbol &_Symbol, MCFragment *_Fragment,
                            uint64_t _Offset, MCAssembler *A)
-  : Symbol(_Symbol), Fragment(_Fragment), Offset(_Offset),
+  : Symbol(&_Symbol), Fragment(_Fragment), Offset(_Offset),
     IsExternal(false), IsPrivateExtern(false),
     CommonSize(0), CommonAlign(0), Flags(0), Index(0)
 {