Vboot Reference: Initialize local pointers with NULL.

I tried this with the build_autotest.sh and the test built successfully this time. Hopefully this is the end of the autotest compile errors.

Review URL: http://codereview.chromium.org/874003
diff --git a/utils/dumpRSAPublicKey.c b/utils/dumpRSAPublicKey.c
index e3ac4b7..b6a5190 100644
--- a/utils/dumpRSAPublicKey.c
+++ b/utils/dumpRSAPublicKey.c
@@ -43,10 +43,10 @@
 void output(RSA* key) {
   int i, nwords;
   BIGNUM *N = key->n;
-  BIGNUM *Big1, *Big2, *Big32, *BigMinus1;
-  BIGNUM *B;
-  BIGNUM *N0inv, *R, *RR, *RRTemp, *NnumBits;
-  BIGNUM *n, *rr;
+  BIGNUM *Big1 = NULL, *Big2 = NULL, *Big32 = NULL, *BigMinus1 = NULL;
+  BIGNUM *B = NULL;
+  BIGNUM *N0inv= NULL, *R = NULL, *RR = NULL, *RRTemp = NULL, *NnumBits = NULL;
+  BIGNUM *n = NULL, *rr = NULL;
   BN_CTX *bn_ctx = BN_CTX_new();
   uint32_t n0invout;