crypto/sparcv9cap.c: fix overstep in getisax.

Problem was introduced in 299ccadcdb99001c618d188fb243c1caaaa86a1c
as future extension, i.e. at this point it wasn't an actual problem,
because uninitialized capability bit was not actually used.

Reviewed-by: Tim Hudson <tjh@openssl.org>

crypto/sparcv9cap.c

diff --git a/crypto/sparcv9cap.c b/crypto/sparcv9cap.c
index 92841ce..093c5eb 100644
--- a/crypto/sparcv9cap.c
+++ b/crypto/sparcv9cap.c
@@ -164,9 +164,9 @@
 
 #if defined(__sun) && defined(__SVR4)
     if (getisax != NULL) {
-        unsigned int vec[1];
+        unsigned int vec[2] = { 0, 0 };
 
-        if (getisax (vec,1)) {
+        if (getisax (vec,2)) {
             if (vec[0]&0x00020) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS1;
             if (vec[0]&0x00040) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS2;
             if (vec[0]&0x00080) OPENSSL_sparcv9cap_P[0] |= SPARCV9_BLK;