Fix bug in Mapper.load1kVromBank

This is used by MMC3 and MMC5.  I haven't actually noticed any issues while playing, though I suspect it's because *if* the MMC3 game I've been playing (Crystalis) even uses this function at all, it gets by with only using the Tile data, which is being copied correctly.

Author: shicks

src/mappers.js

@@ -442,9 +442,9 @@ Mappers[0].prototype = {
     var bankoffset = (bank1k % 4) * 1024;
     utils.copyArrayElements(
       this.nes.rom.vrom[bank4k],
-      0,
-      this.nes.ppu.vramMem,
       bankoffset,
+      this.nes.ppu.vramMem,
+      address,
       1024
     );