trivial: Improve include comment in src/interfaces/wallet.h

Author: promag

src/interfaces/wallet.h

@@ -6,7 +6,7 @@
 #define BITCOIN_INTERFACES_WALLET_H
 
 #include <amount.h>                    // For CAmount
-#include <pubkey.h>                    // For CTxDestination (CKeyID and CScriptID)
+#include <pubkey.h>                    // For CKeyID and CScriptID (definitions needed in CTxDestination instantiation)
 #include <script/ismine.h>             // For isminefilter, isminetype
 #include <script/standard.h>           // For CTxDestination
 #include <support/allocators/secure.h> // For SecureString