Add a few missing initializers.

llvm-svn: 120350
diff --git a/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index 2e7342d..f9a792e 100644
--- a/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -634,8 +634,8 @@
 
     int OffsetRegNum = 0;
     bool OffsetRegShifted = false;
-    enum ShiftType ShiftType;
-    const MCExpr *ShiftAmount;
+    enum ShiftType ShiftType = Lsl;
+    const MCExpr *ShiftAmount = 0;
     const MCExpr *Offset = 0;
 
     const AsmToken &NextTok = Parser.getTok();