Fixing a logic error where we would incorrectly show the newly crafted function not found error for a Python function in some cases where the function actually existed and had an empty docstring

llvm-svn: 164334

lldb/source/Interpreter/ScriptInterpreterPython.cpp

@@ -2555,9 +2555,10 @@ ScriptInterpreterPython::GetDocumentationForItem(const char* item, std::string&
     
     if (ExecuteOneLineWithReturn (command.c_str(),
                                  ScriptInterpreter::eScriptReturnTypeCharStrOrNone,
-                                 &result_ptr, false) && result_ptr)
+                                 &result_ptr, false))
     {
-        dest.assign(result_ptr);
+        if (result_ptr)
+            dest.assign(result_ptr);
         return true;
     }
     else