Slow string validation

[boris768]

MasterHide/MasterHide/mh_hooks.cpp

Line 380 in 3e79de1

if ( strlen( Serial ) > 0 )

MasterHide/MasterHide/mh_hooks.cpp

Line 392 in 3e79de1

if ( strlen( Model ) > 0 )

MasterHide/MasterHide/mh_hooks.cpp

Line 423 in 3e79de1

if ( strlen( Serial ) > 0 )

MasterHide/MasterHide/mh_hooks.cpp

Line 435 in 3e79de1

if ( strlen( Model ) > 0 )

Decreased performance, more correct do like
Serial [0] != '\0'