datetime: just return NULL on short input strings instead of a warning
datetime: just return NULL on short input strings instead of a warning

We want to be able to use this function on random non-NULL input,
this should not result in a runtime-critical.

jpxiong/gstreamer,ensonic/gstreamer,krieger-od/gstreamer,ensonic/gstreamer,shelsonjava/gstreamer,lovebug356/gstreamer,justinjoy/gstreamer,justinjoy/gstreamer,mparis/gstreamer,ensonic/gstreamer,cablelabs/gstreamer,lovebug356/gstreamer,krichter722/gstreamer,Lachann/gstreamer,jpakkane/gstreamer,krieger-od/gstreamer,Lachann/gstreamer,justinjoy/gstreamer,jpxiong/gstreamer,shelsonjava/gstreamer,jpakkane/gstreamer,Lachann/gstreamer,surround-io/gstreamer,jpakkane/gstreamer,Lachann/gstreamer,cfoch/gstreamer,Lachann/gstreamer,krichter722/gstreamer,cfoch/gstreamer,lubosz/gstreamer,krichter722/gstreamer,surround-io/gstreamer,cablelabs/gstreamer,lubosz/gstreamer,surround-io/gstreamer,justinjoy/gstreamer,cablelabs/gstreamer,StreamUtils/gstreamer,cablelabs/gstreamer,lubosz/gstreamer,ensonic/gstreamer,StreamUtils/gstreamer,collects/gstreamer,jpakkane/gstreamer,jpxiong/gstreamer,centricular/gstreamer,mparis/gstreamer,shelsonjava/gstreamer,lubosz/gstreamer,collects/gstreamer,collects/gstreamer,StreamUtils/gstreamer,cablelabs/gstreamer,mparis/gstreamer,collects/gstreamer,jpxiong/gstreamer,lubosz/gstreamer,lovebug356/gstreamer,surround-io/gstreamer,jpakkane/gstreamer,centricular/gstreamer,krichter722/gstreamer,krieger-od/gstreamer,collects/gstreamer,krichter722/gstreamer,jpxiong/gstreamer,centricular/gstreamer,StreamUtils/gstreamer,centricular/gstreamer,krieger-od/gstreamer,surround-io/gstreamer,cfoch/gstreamer,cfoch/gstreamer,shelsonjava/gstreamer,lovebug356/gstreamer,mparis/gstreamer,cfoch/gstreamer,krieger-od/gstreamer,justinjoy/gstreamer,lovebug356/gstreamer,mparis/gstreamer,StreamUtils/gstreamer,ensonic/gstreamer,centricular/gstreamer,shelsonjava/gstreamer