Fix medium impact coverity reports

core/meta/src/TMethodCall.cxx

core/metautils/inc/TSchemaRuleProcessor.h

core/metautils/src/RConversionRuleParser.cxx

core/rint/src/TTabCom.cxx

io/dcache/src/TDCacheFile.cxx

io/io/src/TMakeProject.cxx

io/io/src/TStreamerInfo.cxx

tree/tree/src/TBranchElement.cxx

tree/tree/src/TTree.cxx

tree/tree/src/TTreeSQL.cxx

tree/treeplayer/src/TSelectorDraw.cxx

tree/treeplayer/src/TSelectorEntries.cxx