topo_expl: fix broken build (#224)

tools/topo_expl/utils.cpp

@@ -30,7 +30,7 @@
 #include "model.h"
 #include "utils.h"
 
-const char* ncclFuncStr[NCCL_NUM_FUNCTIONS] = { "Broadcast", "Reduce", "AllGather", "ReduceScatter", "AllReduce" };
+const char* ncclFuncStr[NCCL_NUM_FUNCTIONS+3] = { "Broadcast", "Reduce", "AllGather", "ReduceScatter", "AllReduce", "Gather", "Scatter", "AllToAll" };
 const char* ncclAlgoStr[NCCL_NUM_ALGORITHMS] = { "Tree", "Ring", "CollNet" };
 const char* ncclProtoStr[NCCL_NUM_PROTOCOLS] = { "LL", "LL128", "Simple" };