Empty comments / blank lines at start of file break parsing

**Empty**

```
# Some comment
#
# Some other comment
msgid ""
msgstr ""
"Content-Transfer-Encoding: 8bit\n"
...
```

**Blank**

```
# Some comment

# Some other comment
msgid ""
msgstr ""
"Content-Transfer-Encoding: 8bit\n"
...
```
