Corrected string->int conversion bug in TargetPinDescriptor.

The `numericPosition` member should really be removed. Will revisit later.

src/Targets/TargetPinDescriptor.cpp

@@ -9,7 +9,11 @@ namespace Targets
         const std::optional<std::string>& padKey
     )
         : position(position)
-        , numericPosition(Services::StringService::toUint16(this->position, 10))
+        , numericPosition(
+            Services::StringService::isNumeric(this->position)
+                ? Services::StringService::toUint16(this->position, 10)
+                : 0
+        )
         , padKey(padKey)
     {}
 }

src/Targets/TargetPinDescriptor.hpp

@@ -10,7 +10,7 @@ namespace Targets
     {
     public:
         std::string position;
-        std::uint16_t numericPosition;
+        std::uint16_t numericPosition; // TODO: Consider removing this bodge. Review after v1.1.0
         std::optional<std::string> padKey;
 
         TargetPinDescriptor(