Merge bitcoin#677: Remove note about heap allocation in secp256k1_ecm…

…ult_odd_multiples_table_storage_var

b76142f Remove note about heap allocation in secp256k1_ecmult_odd_multiples_table_storage_var which was removed in 4704527 (Jonas Nick)

Pull request description:

  ...which was removed in 4704527. h/t @roconnor-blockstream

ACKs for commit b76142:

Tree-SHA512: 05fcd7aa5d765f1f5d31b93d40c2621e1dd9674a0db136a1e1cb216d6c01f5be1580275700cbdc08feda8f165b3b349640472d0bdec770bebb23f952225e3f52

src/ecmult_impl.h

@@ -138,7 +138,7 @@ static void secp256k1_ecmult_odd_multiples_table(int n, secp256k1_gej *prej, sec
  *    It only operates on tables sized for WINDOW_A wnaf multiples.
  *  - secp256k1_ecmult_odd_multiples_table_storage_var, which converts its
  *    resulting point set to actually affine points, and stores those in pre.
- *    It operates on tables of any size, but uses heap-allocated temporaries.
+ *    It operates on tables of any size.
  *
  *  To compute a*P + b*G, we compute a table for P using the first function,
  *  and for G using the second (which requires an inverse, but it only needs to