core: Silence warnings when compiling without asserts

src/core/hle/kernel/memory/address_space_info.cpp

@@ -96,6 +96,7 @@ u64 AddressSpaceInfo::GetAddressSpaceStart(std::size_t width, Type type) {
         return AddressSpaceInfos[AddressSpaceIndices39Bit[index]].address;
     }
     UNREACHABLE();
+    return 0;
 }
 
 std::size_t AddressSpaceInfo::GetAddressSpaceSize(std::size_t width, Type type) {
@@ -112,6 +113,7 @@ std::size_t AddressSpaceInfo::GetAddressSpaceSize(std::size_t width, Type type)
         return AddressSpaceInfos[AddressSpaceIndices39Bit[index]].size;
     }
     UNREACHABLE();
+    return 0;
 }
 
 } // namespace Kernel::Memory

src/core/hle/service/sockets/sockets_translate.cpp

@@ -64,6 +64,7 @@ Network::Type Translate(Type type) {
         return Network::Type::DGRAM;
     default:
         UNIMPLEMENTED_MSG("Unimplemented type={}", type);
+        return Network::Type{};
     }
 }