samples error large Integer

[arnold-b]

Hello,

there are many samples which have and integer error like this:
delay_us is just defined as unsigned int. and that means only 16 bit. 1000*1000 are already more.

CC driver/dht22.c
driver/dht22.c: In function 'DHTRead':
driver/dht22.c:71:10: error: large integer implicitly truncated to unsigned type [-Werror=overflow]
sleepms(250);
^
driver/dht22.c:30:32: note: in definition of macro 'sleepms'
#define sleepms(x) os_delay_us(x*1000);
^
cc1.exe: all warnings being treated as errors
mingw32-make.exe: *** [build/driver/dht22.o] Error 1
../common_nonos.mk:351: recipe for target 'build/driver/dht22.o' failed

20:46:55 Build Finished (took 6s.623ms)