from Gabriel: 

 fix patch for TH1 -> previous changes in TH1 Add, Multiply, Chi2TestX had not been committed


git-svn-id: https://root.cern.ch/svn/root/trunk@48408 27541ba8-7e3a-0410-8455-c3a389f83636
from Gabriel: 

 Fixed coverity issues: 48371, 48513, 47921, 48345, 47920, 48348, 47886, 47885


git-svn-id: https://root.cern.ch/svn/root/trunk@48409 27541ba8-7e3a-0410-8455-c3a389f83636