Fix compiler warnings

lib/blisp.c

@@ -73,7 +73,7 @@ int32_t blisp_device_open(struct blisp_device* device, const char* port_name) {
   sp_set_stopbits(serial_port, 1);
   sp_set_flowcontrol(serial_port, SP_FLOWCONTROL_NONE);
 
-  uint32_t vid, pid;
+  int vid, pid;
   sp_get_port_usb_vid_pid(serial_port, &vid, &pid);
   device->is_usb = pid == 0xFFFF;
   //  if (device->is_usb) {

lib/blisp_easy.c

@@ -24,6 +24,8 @@ static int64_t blisp_easy_transport_size(struct blisp_easy_transport* transport)
     return transport->data.memory.data_size;
   } else {
     // TODO: Implement
+	  printf("%s() Warning: calling non-implemented function\n", __func__);
+	  return -1;
   }
 }
 

tools/blisp/src/common.c

@@ -11,7 +11,7 @@
 #include "util.h"
 
 void blisp_common_progress_callback(uint32_t current_value, uint32_t max_value) {
-  printf("%" PRIu32 "b / %ldb (%.2f%%)\n", current_value, max_value,
+  printf("%" PRIu32 "b / %u (%.2f%%)\n", current_value, max_value,
          (((float)current_value / (float)max_value) * 100.0f));
 }