(svn r2633) Move spritecache related variable from variables.h to spritecache.[ch]

settings.c

@@ -2,6 +2,7 @@
 #include "openttd.h"
 #include "screenshot.h"
 #include "sound.h"
+#include "spritecache.h"
 #include "string.h"
 #include "table/currency.h"
 #include "network.h"

spritecache.c

@@ -54,6 +54,8 @@ static uint16 _sprite_xsize[NUM_SPRITES];
 static uint8 _sprite_ysize[NUM_SPRITES];
 #endif
 
+bool _cache_sprites;
+
 typedef struct MemBlock {
 	uint32 size;
 	byte data[VARARRAY_SIZE];

spritecache.h

@@ -31,4 +31,6 @@ static inline const byte *GetNonSprite(SpriteID sprite)
 void GfxLoadSprites(void);
 void IncreaseSpriteLRU(void);
 
+extern bool _cache_sprites;
+
 #endif

variables.h

@@ -341,8 +341,6 @@ VARDEF Vehicle *_place_clicked_vehicle;
 
 VARDEF char _ini_videodriver[16], _ini_musicdriver[16], _ini_sounddriver[16];
 
-VARDEF bool _cache_sprites;
-
 // debug features
 VARDEF char _savedump_path[64];
 VARDEF uint _savedump_first, _savedump_freq, _savedump_last;