opal_info_support: fix memory leak

Fixing a memory leak I introduced with a3229c3a1f855ecf31b379705ce46937ef4c0654.

Signed-off-by: Karol Mroz <mroz.karol@gmail.com>

opal/runtime/opal_info_support.c

@@ -740,6 +740,7 @@ static void opal_info_show_mca_group_params(const mca_base_var_group_t *group, m
         }
         opal_info_show_mca_group_params(group, max_level, want_internal);
     }
+    free(component_msg);
 }
 
 void opal_info_show_mca_params(const char *type, const char *component,