ssl->ctx cannot be NULL.

Most code already dereferences it directly.

Change-Id: I227fa91ecbf25a19077f7cfba21b0abd2bc2bd1d
Reviewed-on: https://boringssl-review.googlesource.com/7422
Reviewed-by: David Benjamin <davidben@google.com>
diff --git a/ssl/d1_srtp.c b/ssl/d1_srtp.c
index 0f2b763..ce15ee2 100644
--- a/ssl/d1_srtp.c
+++ b/ssl/d1_srtp.c
@@ -211,7 +211,7 @@
     return ssl->srtp_profiles;
   }
 
-  if (ssl->ctx != NULL && ssl->ctx->srtp_profiles != NULL) {
+  if (ssl->ctx->srtp_profiles != NULL) {
     return ssl->ctx->srtp_profiles;
   }