aurinfo: Fix bug with space indents creating split packages

If a .SRCINFO line doesn't start with a tab, check if the key is pkgname
before adding it as a package.

Fixes a bug where if you have accidentally gotten a line indented with
spaces, from that line forward it will think it is a split package,
instead of erroring out.
Reported-by: Raansu <Gero3977@gmail.com>
Signed-off-by: Johannes Löthberg <johannes@kyriasis.com>
Signed-off-by: Lukas Fleischer <lfleischer@archlinux.org>

git-interface/aurinfo.py

@@ -132,8 +132,12 @@ def ParseAurinfoFromIterable(iterable, ecatcher=None):
 
             if key == 'pkgbase':
                 current_package = aurinfo.SetPkgbase(value)
-            else:
+            elif key == 'pkgname':
                 current_package = aurinfo.AddPackage(value)
+            else:
+                ecatcher.Catch(lineno, 'unexpected new section not starting '
+                               'with \'pkgname\' found')
+                continue
         else:
             # package attribute
             if current_package is None: