drivers/lsm303dlhc: correct cast of phydat_t*
drivers/lsm303dlhc: correct cast of phydat_t*

The read functions have a lsm303dlhc_3d_data_t* argument which is a
struct with 3 int16_t members. Thus we should cast res->val instead of
just res.

toonst/RIOT,x3ro/RIOT,OlegHahm/RIOT,aeneby/RIOT,BytesGalore/RIOT,rfuentess/RIOT,kaspar030/RIOT,cladmi/RIOT,A-Paul/RIOT,ant9000/RIOT,OTAkeys/RIOT,authmillenon/RIOT,yogo1212/RIOT,jasonatran/RIOT,mtausig/RIOT,yogo1212/RIOT,ant9000/RIOT,yogo1212/RIOT,BytesGalore/RIOT,mfrey/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,toonst/RIOT,OTAkeys/RIOT,lazytech-org/RIOT,mfrey/RIOT,rfuentess/RIOT,rfuentess/RIOT,basilfx/RIOT,yogo1212/RIOT,miri64/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,A-Paul/RIOT,rfuentess/RIOT,toonst/RIOT,x3ro/RIOT,mfrey/RIOT,basilfx/RIOT,OlegHahm/RIOT,jasonatran/RIOT,kYc0o/RIOT,lazytech-org/RIOT,kaspar030/RIOT,authmillenon/RIOT,smlng/RIOT,OlegHahm/RIOT,aeneby/RIOT,basilfx/RIOT,aeneby/RIOT,kYc0o/RIOT,smlng/RIOT,yogo1212/RIOT,cladmi/RIOT,ant9000/RIOT,miri64/RIOT,josephnoir/RIOT,toonst/RIOT,mfrey/RIOT,josephnoir/RIOT,josephnoir/RIOT,miri64/RIOT,kaspar030/RIOT,smlng/RIOT,basilfx/RIOT,x3ro/RIOT,RIOT-OS/RIOT,authmillenon/RIOT,mtausig/RIOT,josephnoir/RIOT,smlng/RIOT,toonst/RIOT,mfrey/RIOT,ant9000/RIOT,BytesGalore/RIOT,josephnoir/RIOT,lazytech-org/RIOT,A-Paul/RIOT,A-Paul/RIOT,OlegHahm/RIOT,RIOT-OS/RIOT,mtausig/RIOT,BytesGalore/RIOT,authmillenon/RIOT,jasonatran/RIOT,RIOT-OS/RIOT,miri64/RIOT,basilfx/RIOT,kYc0o/RIOT,ant9000/RIOT,cladmi/RIOT,x3ro/RIOT,x3ro/RIOT,BytesGalore/RIOT,aeneby/RIOT,lazytech-org/RIOT,aeneby/RIOT,OlegHahm/RIOT,rfuentess/RIOT,mtausig/RIOT,kYc0o/RIOT,mtausig/RIOT,kaspar030/RIOT,OTAkeys/RIOT,lazytech-org/RIOT,OTAkeys/RIOT,jasonatran/RIOT,miri64/RIOT,OTAkeys/RIOT,A-Paul/RIOT,yogo1212/RIOT,kYc0o/RIOT,cladmi/RIOT,cladmi/RIOT,smlng/RIOT,jasonatran/RIOT,kaspar030/RIOT