File fix-return-values.patch of Package python-grpcio

--- a/src/core/lib/promise/party.h.orig	2024-11-11 14:00:44.490673887 +0100
+++ a/src/core/lib/promise/party.h	2024-11-11 14:02:48.118488108 +0100
@@ -271,6 +271,7 @@
           Crash(
               "unreachable: promises should not be repolled after completion");
       }
+      return false;
     }
 
     // Outside party poll: check whether the spawning party has completed this
@@ -283,6 +284,7 @@
         case State::kResult:
           return std::move(result_);
       }
+      return Pending{};
     }
 
     void Destroy() override { this->Unref(); }
--- a/src/core/lib/transport/call_state.h.orig	2024-11-11 07:50:17.722436657 +0100
+++ a/src/core/lib/transport/call_state.h	2024-11-11 14:42:59.094684115 +0100
@@ -93,6 +93,7 @@
       case ClientToServerPullState::kTerminated:
         return "Terminated";
     }
+    return "";
   }
   template <typename Sink>
   friend void AbslStringify(Sink& out, ClientToServerPullState state) {
@@ -123,6 +124,7 @@
       case ClientToServerPushState::kFinished:
         return "Finished";
     }
+    return "";
   }
   template <typename Sink>
   friend void AbslStringify(Sink& out, ClientToServerPushState state) {
@@ -177,6 +179,7 @@
       case ServerToClientPullState::kTerminated:
         return "Terminated";
     }
+    return "";
   }
   template <typename Sink>
   friend void AbslStringify(Sink& out, ServerToClientPullState state) {
@@ -214,6 +217,7 @@
       case ServerToClientPushState::kFinished:
         return "Finished";
     }
+    return "";
   }
   template <typename Sink>
   friend void AbslStringify(Sink& out, ServerToClientPushState state) {
@@ -244,6 +248,7 @@
       case ServerTrailingMetadataState::kPulledCancel:
         return "PulledCancel";
     }
+    return "";
   }
   template <typename Sink>
   friend void AbslStringify(Sink& out, ServerTrailingMetadataState state) {