Fix warning from root and compilation

• [2018-03-21 19:38] Validation started with lhcb-moore-test#1
• [2018-03-21 20:24] Validation started with lhcb-moore-test#1
• [2018-03-21 21:17] Validation started with lhcb-moore-test#1
• [2018-03-22 01:09] Validation started with lhcb-moore-test#2
• [2018-03-22 01:12] Validation started with lhcb-2018-patches#153
• [2018-03-22 02:17] Validation started with lhcb-moore-test#2
• [2018-03-22 03:39] Validation started with lhcb-moore-test#2
• [2018-03-23 00:58] Validation started with lhcb-2018-patches#154
• [2018-03-23 02:05] Validation started with lhcb-moore-test#3
• [2018-03-24 00:41] Validation started with lhcb-2018-patches#155
• [2018-03-24 00:53] Validation started with lhcb-moore-test#4
• [2018-03-24 09:27] Validation started with lhcb-2018-patches#156
• [2018-03-25 00:38] Validation started with lhcb-moore-test#5
• [2018-03-25 01:03] Validation started with lhcb-2018-patches#157
• [2018-03-26 00:39] Validation started with lhcb-moore-test#6
• [2018-03-26 01:49] Validation started with lhcb-2018-patches#158
• [2018-03-27 00:50] Validation started with lhcb-2018-patches#159
• [2018-03-27 00:55] Validation started with lhcb-moore-test#7

added 1 commit

• c67a757f - Fix warning

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merged

mentioned in commit 16be10f0