Fix inlining into null coalescing operator.

ICSharpCode.Decompiler/ILAst/ILInlining.cs

@@ -385,7 +385,7 @@ namespace ICSharpCode.Decompiler.ILAst
 			for (int i = 0; i < expr.Arguments.Count; i++) {
 				// Stop when seeing an opcode that does not guarantee that its operands will be evaluated.
 				// Inlining in that case might result in the inlined expresion not being evaluted.
-				if (i == 1 && (expr.Code == ILCode.LogicAnd || expr.Code == ILCode.LogicOr || expr.Code == ILCode.TernaryOp))
+				if (i == 1 && (expr.Code == ILCode.LogicAnd || expr.Code == ILCode.LogicOr || expr.Code == ILCode.TernaryOp || expr.Code == ILCode.NullCoalescing))
 					return false;
 				
 				ILExpression arg = expr.Arguments[i];

ICSharpCode.Decompiler/ILAst/SimpleControlFlow.cs

@@ -306,7 +306,7 @@ namespace ICSharpCode.Decompiler.ILAst
 			if (!opBitwiseCallExpr.Match(ILCode.Call, out opBitwise, out leftVarExpression, out rightExpression))
 				return false;
 			
-			if (!opFalseArg.MatchLdloc(leftVarExpression.Operand as ILVariable))
+			if (!leftVarExpression.MatchLdloc(leftVar))
 				return false;
 			
 			// ignore operators other than op_BitwiseAnd and op_BitwiseOr