make methods of alloc_buf_hook return the same types (#39141)

Author: JeffBezanson

base/stream.jl

@@ -554,7 +554,7 @@ function alloc_request(buffer::IOBuffer, recommended_size::UInt)
     ensureroom(buffer, Int(recommended_size))
     ptr = buffer.append ? buffer.size + 1 : buffer.ptr
     nb = min(length(buffer.data), buffer.maxsize) - ptr + 1
-    return (pointer(buffer.data, ptr), nb)
+    return (Ptr{Cvoid}(pointer(buffer.data, ptr)), nb)
 end
 
 notify_filled(buffer::IOBuffer, nread::Int, base::Ptr{Cvoid}, len::UInt) = notify_filled(buffer, nread)

stdlib/Sockets/src/Sockets.jl

@@ -367,7 +367,7 @@ function recvfrom(sock::UDPSocket)
     end
 end
 
-alloc_buf_hook(sock::UDPSocket, size::UInt) = (Libc.malloc(size), size) # size is always 64k from libuv
+alloc_buf_hook(sock::UDPSocket, size::UInt) = (Libc.malloc(size), Int(size)) # size is always 64k from libuv
 
 function uv_recvcb(handle::Ptr{Cvoid}, nread::Cssize_t, buf::Ptr{Cvoid}, addr::Ptr{Cvoid}, flags::Cuint)
     sock = @handle_as handle UDPSocket