Reduce dPiece from int to uint16_t

Source/gendung.cpp

@@ -42,7 +42,7 @@ ScrollStruct ScrollInfo;
 int MicroTileLen;
 char TransVal;
 bool TransList[256];
-int dPiece[MAXDUNX][MAXDUNY];
+uint16_t dPiece[MAXDUNX][MAXDUNY];
 MICROS DPieceMicros[MAXTILES + 1];
 int8_t dTransVal[MAXDUNX][MAXDUNY];
 char dLight[MAXDUNX][MAXDUNY];

Source/gendung.h

@@ -176,7 +176,7 @@ extern char TransVal;
 /** Specifies the active transparency indices. */
 extern bool TransList[256];
 /** Contains the piece IDs of each tile on the map. */
-extern DVL_API_FOR_TEST int dPiece[MAXDUNX][MAXDUNY];
+extern DVL_API_FOR_TEST uint16_t dPiece[MAXDUNX][MAXDUNY];
 /** Map of micros that comprises a full tile for any given dungeon piece. */
 extern MICROS DPieceMicros[MAXTILES + 1];
 /** Specifies the transparency at each coordinate of the map. */