Fix ALSA check; was overwriting the ALSA_CFLAGS and ALSA_LIBS variables determined for alsa 0.5 with the ones from th...

Original commit message from CVS:
Fix ALSA check; was overwriting the ALSA_CFLAGS and ALSA_LIBS variables
determined for alsa 0.5 with the ones from the check that alsa 0.9 wasn't
there.  Now does the 0.9 check first, to avoid this problem.