textfile: find_key parsing nit
textfile: find_key parsing nit

The find_key function should return a pointer to the begining of the
line in the config file (map) that has the given keyword. This patch
fixes a wrong logic when the another keyword has the given keyword as a
prefix and appears in the first line of the file.

ComputeCycles/bluez,mapfau/bluez,ComputeCycles/bluez,silent-snowman/bluez,pstglia/external-bluetooth-bluez,pkarasev3/bluez,silent-snowman/bluez,pstglia/external-bluetooth-bluez,silent-snowman/bluez,pstglia/external-bluetooth-bluez,mapfau/bluez,silent-snowman/bluez,pstglia/external-bluetooth-bluez,pkarasev3/bluez,pkarasev3/bluez,pkarasev3/bluez,mapfau/bluez,mapfau/bluez,ComputeCycles/bluez,ComputeCycles/bluez