translate: squash warnings

src/gallium/auxiliary/translate/translate_cache.c

 #include "pipe/p_util.h"
 #include "pipe/p_state.h"
 #include "translate.h"
+#include "translate_cache.h"
 
 #include "cso_cache/cso_cache.h"
 #include "cso_cache/cso_hash.h"
    struct cso_hash *hash;
 };
 
-struct translate_cache * translate_cache_create()
+struct translate_cache * translate_cache_create( void )
 {
    struct translate_cache *cache = MALLOC_STRUCT(translate_cache);
    cache->hash = cso_hash_create();

src/gallium/auxiliary/translate/translate_cache.h

 struct translate_key;
 struct translate;
 
-struct translate_cache *translate_cache_create();
+struct translate_cache *translate_cache_create( void );
 void translate_cache_destroy(struct translate_cache *cache);
 
 /**