GD32F450 SDIO: Fix single sector writes getting ignored

lib/ZuluSCSI_platform_GD32F450/gd32_sdio_sdcard.c

@@ -1014,7 +1014,7 @@ sd_error_enum sd_multiblocks_write(uint32_t *pwritebuffer, uint64_t writeaddr, u
         return status;
     }
 
-    if(blocksnumber > 1) {
+    if(blocksnumber >= 1) {
         if(blocksnumber * blocksize > SD_MAX_DATA_LENGTH) {
             status = SD_PARAMETER_INVALID;
             return status;