Fix pkgver by using correct variable

Thanks for noting this to user audeoudh, who commented on that error in
https://aur.archlinux.org/packages/purple-rocketchat-git/#comment-788399

1 files changed, 1 insertions, 1 deletions

diff --git a/PKGBUILD b/PKGBUILD
index a9a948b79073..432f41be7d35 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -19,7 +19,7 @@ source=('git+https://github.com/EionRobb/purple-rocketchat')
 md5sums=('SKIP')
 
 pkgver() {
-    cd "$srcdir/$_reponame"
+    cd "$srcdir/$_pkgname"
     printf "%s.%s" "$(git rev-list --count HEAD)" "$(git rev-parse --short HEAD)"
 }