fxt_tool fix a double free
This fixes a double-free if a node's prof file uses fewer resources than the previous nodes. For example, if there are two nodes, the first prof file has a 0_CUDA0_0, and the second does not.
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This fixes a double-free if a node's prof file uses fewer resources than the previous nodes. For example, if there are two nodes, the first prof file has a 0_CUDA0_0, and the second does not.