Compilation failure at GO GET time.

[stephan57160]

Example:

[devel@prod-70676b ~]$ go get github.com/misakwa/gozyre
# github.com/misakwa/gozyre
go/src/github.com/misakwa/gozyre/util.go:61: cannot use unsafe.Pointer(zmsg) (type unsafe.Pointer) as type **C.struct__zmsg_t in argument to func literal
[devel@prod-70676b ~]$ 
[devel@prod-70676b ~]$ go version
go version go1.9.3 linux/arm
[devel@prod-70676b ~]$ 

Patch proposal:

diff --git a/util.go b/util.go                                                                                                         
index 87ee4e8..085dd02 100644                                                                                                          
--- a/util.go                                                                                                                          
+++ b/util.go                                                                                                                          
@@ -58,7 +58,7 @@ func bytesToZmsg(ch <-chan []byte) (*C.struct__zmsg_t, error) {
                // gc collects it too early                                                                                            
                ret := C.zmsg_addmem(zmsg, unsafe.Pointer(&frame[0]), C.size_t(len(frame)))                                            
                if ret != 0 {                                                                                                          
-                       C.zmsg_destroy(unsafe.Pointer(zmsg))                                                                           
+                       C.zmsg_destroy(&zmsg)                                                                                          
                        err = ErrAddingFrame                                                                                           
                        break                                                                                                          
                }                                                                                                                      

The patch proposal follows other xxx_destroy() calls, found a bit above, in the same file:

                defer C.zlist_destroy(&zlist)
                ...
                defer C.zhash_destroy(&zhash)
                ...