ART: Check var-arg count earlier in method verifier

Check the count in vararg instructions before filling the temp
array. Avoids a DCHECK.

Bug: 21869663
Bug: 20170976

(cherry picked from commit 29498a23bcfe47a7134552aacad5524ecb484a49)

Change-Id: I1ff93502ab84c5967ad54d1b50dba517da791637
1 file changed