fix clang warnings

so that they don't annoy me

pico/32x/memory.c

@@ -1430,7 +1430,7 @@ static const u16 ssh2_code[] = {
   0x2200, 0x03e4  // slave start pointer in ROM
 };
 
-#define HWSWAP(x) (((x) << 16) | ((x) >> 16))
+#define HWSWAP(x) (((u16)(x) << 16) | ((x) >> 16))
 static void get_bios(void)
 {
   u16 *ps;

pico/carthw_cfg.c

@@ -26,7 +26,7 @@ static const char builtin_carthw_cfg[] =
   "hw=ssf2_mapper\n"
   "prop=no_sram\n"
   "[]\n"
-  "check_str=0x150,\"PIER SOLAR<EFBFBD>&THE GREAT ARCHITECTS<EFBFBD> WaterMelon<EFBFBD>\"\n"
+  "check_str=0x150,\"PIER SOLAR\x99&THE GREAT ARCHITECTS\xa9 WaterMelon\x99\"\n"
   "hw=piersolar_mapper\n"
   "sram_range=0xa13009,0xa1300b\n"
   "eeprom_type=3\n"

pico/media.c

@@ -217,7 +217,7 @@ enum media_type_e PicoLoadMedia(const char *filename,
   {
     // check for MegaCD image
     cd_img_type = PicoCdCheck(filename, &cd_region);
-    if (cd_img_type >= 0 && cd_img_type != CIT_NOT_CD)
+    if ((int)cd_img_type >= 0 && cd_img_type != CIT_NOT_CD)
     {
       // valid CD image, ask frontend for BIOS..
       rom_fname = NULL;

platform/common/menu_pico.c

@@ -1082,7 +1082,8 @@ int menu_loop_tray(void)
 		ret = 0; /* no CD inserted */
 	}
 
-	while (in_menu_wait_any(NULL, 50) & (PBTN_MENU|PBTN_MOK|PBTN_MBACK));
+	while (in_menu_wait_any(NULL, 50) & (PBTN_MENU|PBTN_MOK|PBTN_MBACK))
+		;
 	in_set_config_int(0, IN_CFG_BLOCKING, 0);
 	plat_video_menu_leave();