Fix a struct/class mismatch, to silence a MSVC warning.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77673 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/AsmParser/X86AsmParser.cpp b/lib/Target/X86/AsmParser/X86AsmParser.cpp
index 7f4df00..1f00f16 100644
--- a/lib/Target/X86/AsmParser/X86AsmParser.cpp
+++ b/lib/Target/X86/AsmParser/X86AsmParser.cpp
@@ -20,7 +20,7 @@
 using namespace llvm;
 
 namespace {
-class X86Operand;
+struct X86Operand;
 
 class X86ATTAsmParser : public TargetAsmParser {
   MCAsmParser &Parser;