Fix a bug in input deserialization in the C SDK (#17217)

When the input contains more accounts than the user has requested to be deserialized, and one of the excess ones is a dup, the input pointer is not adjusted correctly.

Compare the lines added by this commit to line 401: "input += 7; // padding". Since the input data layout does not depend on the number of accounts the user wants to deserialize, this adjustment by 7 bytes must happen in both branches.

sdk/bpf/c/inc/solana_sdk.h

@@ -345,6 +345,8 @@ static bool sol_deserialize(
         input += MAX_PERMITTED_DATA_INCREASE;
         input = (uint8_t*)(((uint64_t)input + 8 - 1) & ~(8 - 1)); // padding
         input += sizeof(uint64_t);
+      } else {
+        input += 7; // padding
       }
       continue;
     }