bugfix: always at least allocate empty peer map

[wizeguyy]

Resolves #1744

[Djadih]

Still happening
ERROR [05-15|10:56:36.871] Go-Quai Panicked error="assignment to entry in nil map" stacktrace="goroutine 3985 [running]:\nruntime/debug.Stack()\n\t/usr/lib/go/src/runtime/debug/stack.go:24 +0x6b\ngithub.com/dominant-strategies/go-quai/p2p/node.(*P2PNode).requestFromPeers.func1.1()\n\t/home/hdjadi/Github/dominant-strategies/go-quai/p2p/node/api.go:125 +0x145\npanic({0x20ac9e0?, 0x26cc730?})\n\t/usr/lib/go/src/runtime/panic.go:770 +0x136\nmaps.Copy[...](0x0, 0xc16c962d20)\n\t/usr/lib/go/src/maps/maps.go:55 +0xcf\ngithub.com/dominant-strategies/go-quai/p2p/node/peerManager.(*BasicPeerManager).queryDHT(0xc000139f00, 0xc16c951440, 0x0, 0x3)\n\t/home/hdjadi/Github/dominant-strategies/go-quai/p2p/node/peerManager/peerManager.go:358 +0x3e5\ngithub.com/dominant-strategies/go-quai/p2p/node/peerManager.(*BasicPeerManager).GetPeers(0xc000139f00, 0xc16c951440, 0x0)\n\t/home/hdjadi/Github/dominant-strategies/go-quai/p2p/node/peerManager/peerManager.go:341 +0xf3\ngithub.com/dominant-strategies/go-quai/p2p/node.(*P2PNode).requestFromPeers.func1()\n\t/home/hdjadi/Github/dominant-strategies/go-quai/p2p/node/api.go:130 +0x133\ncreated by github.com/dominant-strategies/go-quai/p2p/node.(*P2PNode).requestFromPeers in goroutine 3984\n\t/home/hdjadi/Github/dominant-strategies/go-quai/p2p/node/api.go:120 +0x165\n"

[Djadih]

Still happening ERROR [05-15|10:56:36.871] Go-Quai Panicked error="assignment to entry in nil map" stacktrace="goroutine 3985 [running]:\nruntime/debug.Stack()\n\t/usr/lib/go/src/runtime/debug/stack.go:24 +0x6b\ngithub.com/dominant-strategies/go-quai/p2p/node.(*P2PNode).requestFromPeers.func1.1()\n\t/home/hdjadi/Github/dominant-strategies/go-quai/p2p/node/api.go:125 +0x145\npanic({0x20ac9e0?, 0x26cc730?})\n\t/usr/lib/go/src/runtime/panic.go:770 +0x136\nmaps.Copy[...](0x0, 0xc16c962d20)\n\t/usr/lib/go/src/maps/maps.go:55 +0xcf\ngithub.com/dominant-strategies/go-quai/p2p/node/peerManager.(*BasicPeerManager).queryDHT(0xc000139f00, 0xc16c951440, 0x0, 0x3)\n\t/home/hdjadi/Github/dominant-strategies/go-quai/p2p/node/peerManager/peerManager.go:358 +0x3e5\ngithub.com/dominant-strategies/go-quai/p2p/node/peerManager.(*BasicPeerManager).GetPeers(0xc000139f00, 0xc16c951440, 0x0)\n\t/home/hdjadi/Github/dominant-strategies/go-quai/p2p/node/peerManager/peerManager.go:341 +0xf3\ngithub.com/dominant-strategies/go-quai/p2p/node.(*P2PNode).requestFromPeers.func1()\n\t/home/hdjadi/Github/dominant-strategies/go-quai/p2p/node/api.go:130 +0x133\ncreated by github.com/dominant-strategies/go-quai/p2p/node.(*P2PNode).requestFromPeers in goroutine 3984\n\t/home/hdjadi/Github/dominant-strategies/go-quai/p2p/node/api.go:120 +0x165\n"

Issue likely not related to this fix.

[jdowning100]

LGTM