[TRIVIAL] Fix error log
authorJihoon Lee <jhoon.it.lee@samsung.com>
Thu, 21 Oct 2021 07:34:06 +0000 (16:34 +0900)
committerJijoong Moon <jijoong.moon@samsung.com>
Tue, 26 Oct 2021 00:04:49 +0000 (09:04 +0900)
commitc6695141960059b7efe83176c341466ea22b79d8
tree2a27bf2df99270b42f8f0115e1a2e1186866a41a
parent61520d0d08e5db55800566f868645dd4227d6825
[TRIVIAL] Fix error log

error log string was concated by '+' which was invalid

**Self evaluation:**
1. Build test: [X]Passed [ ]Failed [ ]Skipped
2. Run test: [X]Passed [ ]Failed [ ]Skipped

Signed-off-by: Jihoon Lee <jhoon.it.lee@samsung.com>
nntrainer/dataset/databuffer_factory.cpp