segmentation fault when "./configure --disable-ibv_wr_api"

[tianx666]

I'm using rdma-core-v44, and compile perftest with "bash autoconfig; configure --disable-ibv_wr_api; make", then run a test.

A segmentation fault occurs for ctx->dci_stream_id[i] is not allocated but assigned 0.

I've submitted the fixed code, but I'm not sure if there are other factors to consider. Please take a look, and let me know if there are better ways to modify it.
#304

[sshaulnv]

Hi @tianx666, i answered in the PR.