Do not start using next_line until needed.
Do not start using next_line until needed.

If the while loop is reached file_content will not have changed.

Signed-off-by: mulhern <7b51bcf507bcd7afb72bf8663752c0ddbeb517f6@redhat.com>

atodorov/libblockdev,snbueno/libblockdev,vpodzime/libblockdev,dashea/libblockdev,vpodzime/libblockdev,rhinstaller/libblockdev,rhinstaller/libblockdev,atodorov/libblockdev,vpodzime/libblockdev,dashea/libblockdev,snbueno/libblockdev,rhinstaller/libblockdev,atodorov/libblockdev