Many compiler warnings still after 3 years

[StefanSalewski]

Directly compiling the module give a lot of warnings:

salewski@nuc /tmp/hhh $ nim c --gc:arc rtree.nim 
Hint: used config file '/home/salewski/Nim/config/nim.cfg' [Conf]
Hint: used config file '/home/salewski/Nim/config/config.nims' [Conf]
...................
/tmp/hhh/rtree.nim(1078, 8) template/generic instantiation of `insert` from here
/tmp/hhh/rtree.nim(554, 11) template/generic instantiation of `rsinsert` from here
/tmp/hhh/rtree.nim(540, 15) template/generic instantiation of `adjustTree` from here
/tmp/hhh/rtree.nim(459, 33) template/generic instantiation of `overflowTreatment` from here
/tmp/hhh/rtree.nim(520, 13) template/generic instantiation of `reInsert` from here
/tmp/hhh/rtree.nim(501, 17) template/generic instantiation of `center` from here
/tmp/hhh/rtree.nim(83, 7) Warning: Special variable 'result' is shadowed. [ResultShadowed]
/tmp/hhh/rtree.nim(1078, 8) template/generic instantiation of `insert` from here
/tmp/hhh/rtree.nim(554, 11) template/generic instantiation of `rsinsert` from here
/tmp/hhh/rtree.nim(540, 15) template/generic instantiation of `adjustTree` from here
/tmp/hhh/rtree.nim(459, 33) template/generic instantiation of `overflowTreatment` from here
/tmp/hhh/rtree.nim(520, 13) template/generic instantiation of `reInsert` from here
/tmp/hhh/rtree.nim(502, 56) template/generic instantiation of `distance` from here
/tmp/hhh/rtree.nim(94, 7) Warning: Special variable 'result' is shadowed. [ResultShadowed]
/tmp/hhh/rtree.nim(460, 16) Hint: condition is always true: 't of RTree[4, 2, RT, LT]' [CondTrue]
/tmp/hhh/rtree.nim(1208, 6) template/generic instantiation of `insert` from here
/tmp/hhh/rtree.nim(554, 11) template/generic instantiation of `rsinsert` from here
/tmp/hhh/rtree.nim(540, 15) template/generic instantiation of `adjustTree` from here
/tmp/hhh/rtree.nim(459, 33) template/generic instantiation of `overflowTreatment` from here
/tmp/hhh/rtree.nim(520, 13) template/generic instantiation of `reInsert` from here
/tmp/hhh/rtree.nim(501, 17) template/generic instantiation of `center` from here
/tmp/hhh/rtree.nim(83, 7) Warning: Special variable 'result' is shadowed. [ResultShadowed]
/tmp/hhh/rtree.nim(1208, 6) template/generic instantiation of `insert` from here
/tmp/hhh/rtree.nim(554, 11) template/generic instantiation of `rsinsert` from here
/tmp/hhh/rtree.nim(540, 15) template/generic instantiation of `adjustTree` from here
/tmp/hhh/rtree.nim(459, 33) template/generic instantiation of `overflowTreatment` from here
/tmp/hhh/rtree.nim(520, 13) template/generic instantiation of `reInsert` from here
/tmp/hhh/rtree.nim(502, 56) template/generic instantiation of `distance` from here
/tmp/hhh/rtree.nim(94, 7) Warning: Special variable 'result' is shadowed. [ResultShadowed]
/tmp/hhh/rtree.nim(1208, 6) template/generic instantiation of `insert` from here
/tmp/hhh/rtree.nim(554, 11) template/generic instantiation of `rsinsert` from here
/tmp/hhh/rtree.nim(540, 15) template/generic instantiation of `adjustTree` from here
/tmp/hhh/rtree.nim(459, 33) template/generic instantiation of `overflowTreatment` from here
/tmp/hhh/rtree.nim(523, 24) template/generic instantiation of `rstarSplit` from here
/tmp/hhh/rtree.nim(283, 24) Warning: Deprecated since v1.4; there should not be `high(value)`. Use `high(type)`.; high is deprecated [Deprecated]
/tmp/hhh/rtree.nim(1208, 6) template/generic instantiation of `insert` from here
/tmp/hhh/rtree.nim(554, 11) template/generic instantiation of `rsinsert` from here
/tmp/hhh/rtree.nim(540, 15) template/generic instantiation of `adjustTree` from here
/tmp/hhh/rtree.nim(459, 33) template/generic instantiation of `overflowTreatment` from here
/tmp/hhh/rtree.nim(523, 24) template/generic instantiation of `rstarSplit` from here
/tmp/hhh/rtree.nim(310, 24) Warning: Deprecated since v1.4; there should not be `high(value)`. Use `high(type)`.; high is deprecated [Deprecated]
/tmp/hhh/rtree.nim(460, 16) Hint: condition is always true: 't of RTree[4, 2, RT, LT]' [CondTrue]
/tmp/hhh/rtree.nim(1208, 6) template/generic instantiation of `insert` from here
/tmp/hhh/rtree.nim(554, 11) template/generic instantiation of `rsinsert` from here
/tmp/hhh/rtree.nim(544, 31) template/generic instantiation of `overflowTreatment` from here
/tmp/hhh/rtree.nim(523, 24) template/generic instantiation of `rstarSplit` from here
/tmp/hhh/rtree.nim(283, 24) Warning: Deprecated since v1.4; there should not be `high(value)`. Use `high(type)`.; high is deprecated [Deprecated]
/tmp/hhh/rtree.nim(1208, 6) template/generic instantiation of `insert` from here
/tmp/hhh/rtree.nim(554, 11) template/generic instantiation of `rsinsert` from here
/tmp/hhh/rtree.nim(544, 31) template/generic instantiation of `overflowTreatment` from here
/tmp/hhh/rtree.nim(523, 24) template/generic instantiation of `rstarSplit` from here
/tmp/hhh/rtree.nim(310, 24) Warning: Deprecated since v1.4; there should not be `high(value)`. Use `high(type)`.; high is deprecated [Deprecated]
/tmp/hhh/rtree.nim(615, 10) Hint: condition is always true: 't of RTree[4, 2, RT, LT]' [CondTrue]
/tmp/hhh/rtree.nim(1301, 9) Hint: 'tgs' is declared but not used [XDeclaredButNotUsed]
/tmp/hhh/rtree.nim(1227, 8) Hint: 'ignore' is declared but not used [XDeclaredButNotUsed]
CC: stdlib_assertions.nim
CC: stdlib_dollars.nim
CC: stdlib_formatfloat.nim
CC: stdlib_io.nim
CC: stdlib_system.nim
CC: stdlib_algorithm.nim
CC: stdlib_math.nim
CC: stdlib_heapqueue.nim
CC: stdlib_strutils.nim
CC: stdlib_times.nim
CC: stdlib_random.nim
CC: rtree.nim
Hint:  [Link]
Hint: 40503 lines; 8.774s; 117.922MiB peakmem; Debug build; proj: /tmp/hhh/rtree.nim; out: /tmp/hhh/rtree [SuccessX]