libpq: Fix syntax error
libpq: Fix syntax error

Fixes bug 729177

flobrosch/vala-fixes,frida/vala,rvu95/vala,frida/vala,spidermonkdust/vala,flobrosch/vala-fixes,GNOME/vala,GNOME/vala,GNOME/vala,spidermonkdust/vala,rvu95/vala,GNOME/vala,rvu95/vala,frida/vala,frida/vala,frida/vala,flobrosch/vala-fixes,spidermonkdust/vala