Fixes uninitialized object segfault in debugger (#1162)

* Fixes uninitialized object segfault in debugger
Minor typo fixes

* Fix error check in debugger print cmd

src/sst/core/impl/interactive/simpleDebug.cc

@@ -130,6 +130,11 @@ SimpleDebugger::cmd_print(std::vector<std::string>& tokens)
     // Index in tokens array where we may find the variable name
     size_t var_index = 1;
 
+    if ( tokens.size() < 2 ) {
+        printf("Invalid format for print command (print [-rN] [<obj>])\n");
+        return;
+    }
+
     // See if have a -r or not
     int         recurse = 0;
     std::string tok     = tokens[1];

src/sst/core/impl/interactive/simpleDebug.h

@@ -47,7 +47,7 @@ class SimpleDebugger : public SST::InteractiveConsole
     // directory as far as we can.
     std::vector<std::string> name_stack;
 
-    SST::Core::Serialization::ObjectMap* obj_;
+    SST::Core::Serialization::ObjectMap* obj_ = nullptr;
     bool                                 done = false;
 
     std::vector<std::string> tokenize(std::vector<std::string>& tokens, const std::string& input);

src/sst/core/serialization/objectMap.h

@@ -154,7 +154,7 @@ class ObjectMap
     /**
        Get the list of child variables contained in this ObjectMap
 
-       @return Refernce to vector containing ObjectMaps for this
+       @return Reference to vector containing ObjectMaps for this
        ObjectMap's child variables. Fundamental types will return the
        same empty vector.
      */

src/sst/core/simulation.cc

@@ -836,7 +836,7 @@ Simulation_impl::run()
                 }
 
                 InteractiveAction* act =
-                    new InteractiveAction(this, format_string("Interctive start at %" PRI_SIMTIME, offset));
+                    new InteractiveAction(this, format_string("Interactive start at %" PRI_SIMTIME, offset));
                 act->setDeliveryTime(currentSimCycle + offset);
                 timeVortex->insert(act);
             }