avoid static code analysis warnings

src/EXTRA-PAIR/pair_born_gauss.cpp

@@ -38,6 +38,8 @@ PairBornGauss::PairBornGauss(LAMMPS *lmp) :
   single_enable = 1;
   respa_enable = 0;
   writedata = 1;
+
+  cut_global = 0.0;
 }
 
 /* ---------------------------------------------------------------------- */

src/region_block.cpp

@@ -33,6 +33,8 @@ RegBlock::RegBlock(LAMMPS *lmp, int narg, char **arg) :
     Region(lmp, narg, arg), xlostr(nullptr), ylostr(nullptr), zlostr(nullptr), xhistr(nullptr),
     yhistr(nullptr), zhistr(nullptr)
 {
+  xlovar = xhivar = ylovar = yhivar = zlovar = zhivar = -1;
+
   options(narg - 8, &arg[8]);
 
   xlostyle = CONSTANT;