rm unnecessary file transfer limit

src/main.c

@@ -407,7 +407,7 @@ static void do_file_senders(Tox *m)
 
         int pieces = 0;
 
-        while (pieces++ < MAX_PIECES_SEND) {
+        while (true) {
             if (tox_file_send_data(m, friendnum, filenum, file_senders[i].nextpiece, 
                                    file_senders[i].piecelen) == -1)
                 break;

src/toxic_windows.h

@@ -149,7 +149,6 @@ struct PromptBuf {
 #define MAX_FILES 256
 #define FILE_PIECE_SIZE 1024
 #define TIMEOUT_FILESENDER 300
-#define MAX_PIECES_SEND 100  /* Max number of pieces to send per file per call to do_file_senders() */
 
 typedef struct {
     FILE *file;