avoiding overflow warning for 32/64 bit system (#370)

# Description

Building for 32-bit is giving this error:
`cannot use roomIdMin64 (untyped int constant 1000000000000) as int value in assignment (overflows)`

Even though there is runtime detection for the integer bitsize, we still need to trick the compiler.

This sets it to the 32 bit value and then multiplies it by 1000 if the maxint is over this number.

## Changes

- Changed the way we check for which minimum ephemeral RoomId value to use.

Author: Volte6

internal/rooms/ephemeral.go

@@ -5,21 +5,19 @@ import (
 	"fmt"
 	"math"
 	"time"
-	"unsafe"
 
 	"github.com/GoMudEngine/GoMud/internal/mudlog"
 	"github.com/GoMudEngine/GoMud/internal/util"
 )
 
 const (
-	ephemeralChunksLimit = 100           // The maximum number of ephemeral chunks that can be created
-	ephemeralChunkSize   = 250           // The maximum quantity of ephemeral room's that can be copied/created in a given chunk.
-	roomIdMin32          = 1000000000    // 1,000,000,000
-	roomIdMin64          = 1000000000000 // 1,000,000,000,000
+	ephemeralChunksLimit = 100        // The maximum number of ephemeral chunks that can be created
+	ephemeralChunkSize   = 250        // The maximum quantity of ephemeral room's that can be copied/created in a given chunk.
+	roomIdMin32Bit       = 1000000000 // 1,000,000,000
 )
 
 var (
-	ephemeralRoomIdMinimum = roomIdMin32                   // 1,000,000,000 is assuming 32 bit. the init() function may override this value.
+	ephemeralRoomIdMinimum = roomIdMin32Bit                // 1,000,000,000 is assuming 32 bit. the init() function may override this value.
 	ephemeralRoomChunks    = [ephemeralChunksLimit][]int{} // map of ranges to actual rooms. If empty, slot is available.
 	originalRoomIdLookups  = map[int]int{}                 // a map of ephemeralId's to their original RoomId's, for special purposes
 	// errors
@@ -224,9 +222,7 @@ func GetOriginalRoom(roomId int) int {
 }
 
 func init() {
-	if unsafe.Sizeof(int(0))*8 == 64 {
-		ephemeralRoomIdMinimum = roomIdMin64
-	} else {
-		ephemeralRoomIdMinimum = roomIdMin32
+	if math.MaxInt > ephemeralRoomIdMinimum*1000 {
+		ephemeralRoomIdMinimum = ephemeralRoomIdMinimum * 1000 // 1,000,000,000 => // 1,000,000,000,000
 	}
 }