File zcash-return.patch of Package zcash

--- src/main.cpp	2021-09-17 16:10:54.230606209 +0200
+++ src/main.cpp	2021-09-17 16:18:10.888380166 +0200
@@ -130,6 +130,7 @@
             case UnsatisfiedShieldedReq::OrchardUnknownAnchor:
                 return REJECT_INVALID;
         }
+	return 0;
     }
 
     std::string ShieldedReqRejectReason(UnsatisfiedShieldedReq shieldedReq)
@@ -142,6 +143,7 @@
             case UnsatisfiedShieldedReq::OrchardDuplicateNullifier: return "bad-txns-orchard-duplicate-nullifier";
             case UnsatisfiedShieldedReq::OrchardUnknownAnchor:      return "bad-txns-orchard-unknown-anchor";
         }
+	return 0;
     }
 
     /** Abort with a message */