Fix GDB bug (ooops)

src/gdbstub/gdbstub.c

@@ -261,7 +261,7 @@ void gdbstub_thread_gdb()
 			char data[length * 2 + 1];
 			for(size_t i = 0; i < length; i++)
 			{
-				uint32_t value = mem_read32(address + i);
+				uint32_t value = mem_read8(address + i);
 				snprintf(data + i * 2, 3, "%02x", value);
 			}
 
@@ -283,7 +283,7 @@ void gdbstub_thread_gdb()
 			{
 				uint32_t value;
 				sscanf(packet + data_start + i * 2, "%02x", &value);
-				mem_write32(address + i, value);
+				mem_write8(address + i, value);
 			}
 
 			gdbstub_send_packet("OK", 2);