Fixed constructor, spelling

Author: timcanham

.github/actions/spelling/expect.txt

@@ -658,6 +658,7 @@ TLMPACKET
 TLMPACKETIZER
 TLMPACKETIZERCOMPONENTIMPLCFG
 TLMPACKETIZERTYPES
+tmpl
 TODOLIST
 TOKENBUCKETTESTER
 topologydefs

Fw/Types/StructSerializable.cpp

@@ -14,7 +14,7 @@ namespace Fw {
             SERIALIZED_SIZE = sizeof(T)
         };
 
-        StructSerializable();
+        StructSerializable() {}
         StructSerializable(const T& val) { this->m_val = val; }
         StructSerializable(const T* val) { this->m_val = *val; }
         const T& operator=(const T& val) { this->m_val = val; return val;}