- getting CKA_LABEL would not 0-terminate the string

git-svn-id: https://www.opensc-project.org/svnp/opensc/trunk@1025 c6295689-39f2-0310-b995-f0e70906c6a9

src/tools/pkcs11-tool.c

@@ -750,7 +750,7 @@ get##ATTR(CK_SESSION_HANDLE sess, CK_OBJECT_HANDLE obj, CK_ULONG_PTR pulCount) \
  \
 	rv = p11->C_GetAttributeValue(sess, obj, &attr, 1); \
 	if (rv == CKR_OK) { \
-		if (!(attr.pValue = malloc(attr.ulValueLen))) \
+		if (!(attr.pValue = calloc(1, attr.ulValueLen + 1))) \
 			fatal("out of memory in get" #ATTR ": %m"); \
 		rv = p11->C_GetAttributeValue(sess, obj, &attr, 1); \
 	} \