add suggested not null check

source/RobotAPI/libraries/skills/core/Skill.cpp

@@ -13,6 +13,7 @@ namespace armarx
             // replace constructor if you want to have a specific logging tag
             Logging::setTag("armarx::skills::" + description.skillId.toString());
 
+            ARMARX_CHECK_NOT_NULL(desc.rootProfileDefaults);
             if (!desc.rootProfileDefaults->fullfillsType(desc.parametersType))
             {
                 ARMARX_WARNING << "Missing root profile defaults for skill " << desc.skillId;