block/explosion.go: Calculate damage before destroying blocks (#1133)

This matches vanilla behavior

Author: FDUTCH

server/block/explosion.go

@@ -140,6 +140,13 @@ func (c ExplosionConfig) Explode(tx *world.Tx, explosionPos mgl64.Vec3) {
 		return
 	}
 
+	for _, e := range affectedEntities {
+		if explodable, ok := e.(ExplodableEntity); ok {
+			impact := (1 - e.Position().Sub(explosionPos).Len()/d) * exposure(tx, explosionPos, e)
+			explodable.Explode(explosionPos, impact, c)
+		}
+	}
+
 	for _, pos := range affectedBlocks {
 		bl := tx.Block(pos)
 		if explodable, ok := bl.(Explodable); ok {
@@ -158,13 +165,6 @@ func (c ExplosionConfig) Explode(tx *world.Tx, explosionPos mgl64.Vec3) {
 		}
 	}
 
-	for _, e := range affectedEntities {
-		if explodable, ok := e.(ExplodableEntity); ok {
-			impact := (1 - e.Position().Sub(explosionPos).Len()/d) * exposure(tx, explosionPos, e)
-			explodable.Explode(explosionPos, impact, c)
-		}
-	}
-
 	if spawnFire {
 		for _, pos := range affectedBlocks {
 			if r.IntN(3) == 0 {