The default timeout for EvaluateExpressionOptions is not 0, so if no timeout is provided, we have to set the option timeout to 0 by hand.

<rdar://problem/15846781>

llvm-svn: 199509
diff --git a/lldb/source/Commands/CommandObjectExpression.cpp b/lldb/source/Commands/CommandObjectExpression.cpp
index 5ca44ff..18d144c 100644
--- a/lldb/source/Commands/CommandObjectExpression.cpp
+++ b/lldb/source/Commands/CommandObjectExpression.cpp
@@ -373,6 +373,8 @@
         
         if (m_command_options.timeout > 0)
             options.SetTimeoutUsec(m_command_options.timeout);
+        else
+            options.SetTimeoutUsec(0);
         
         exe_results = target->EvaluateExpression (expr, 
                                                   exe_ctx.GetFramePtr(),