make *_gpu_reinit() functions consistent in returning void. correct prototypes in src/GPU, too.

this supersedes and closes #719

lib/gpu/lal_lj_expand_ext.cpp

@@ -92,7 +92,7 @@ int lje_gpu_init(const int ntypes, double **cutsq, double **host_lj1,
 // ---------------------------------------------------------------------------
 // Copy updated coeffs from host to device
 // ---------------------------------------------------------------------------
-int lje_gpu_reinit(const int ntypes, double **cutsq, double **host_lj1,
+void lje_gpu_reinit(const int ntypes, double **cutsq, double **host_lj1,
                    double **host_lj2, double **host_lj3, double **host_lj4,
                    double **offset, double **shift) {
   int world_me=LJEMF.device->world_me();

src/GPU/pair_gauss_gpu.cpp

@@ -43,7 +43,7 @@ int gauss_gpu_init(const int ntypes, double **cutsq, double **host_a,
                    double **b, double **offset, double *special_lj, const int nlocal,
                    const int nall, const int max_nbors, const int maxspecial,
                    const double cell_size, int &gpu_mode, FILE *screen);
-int gauss_gpu_reinit(const int ntypes, double **cutsq, double **host_a,
+void gauss_gpu_reinit(const int ntypes, double **cutsq, double **host_a,
                    double **b, double **offset);
 void gauss_gpu_clear();
 int ** gauss_gpu_compute_n(const int ago, const int inum,

src/GPU/pair_lj_cut_coul_long_gpu.cpp

@@ -56,7 +56,7 @@ int ljcl_gpu_init(const int ntypes, double **cutsq, double **host_lj1,
                   double **host_cut_ljsq, double host_cut_coulsq,
                   double *host_special_coul, const double qqrd2e,
                   const double g_ewald);
-int ljcl_gpu_reinit(const int ntypes, double **cutsq, double **host_lj1,
+void ljcl_gpu_reinit(const int ntypes, double **cutsq, double **host_lj1,
                     double **host_lj2, double **host_lj3, double **host_lj4,
                     double **offset, double **host_lj_cutsq);
 void ljcl_gpu_clear();

src/GPU/pair_lj_cut_gpu.cpp

@@ -45,7 +45,7 @@ int ljl_gpu_init(const int ntypes, double **cutsq, double **host_lj1,
                  const int nall, const int max_nbors, const int maxspecial,
                  const double cell_size, int &gpu_mode, FILE *screen);
 
-int ljl_gpu_reinit(const int ntypes, double **cutsq, double **host_lj1,
+void ljl_gpu_reinit(const int ntypes, double **cutsq, double **host_lj1,
                    double **host_lj2, double **host_lj3, double **host_lj4,
                    double **offset);
 

src/GPU/pair_lj_expand_gpu.cpp

@@ -45,7 +45,7 @@ int lje_gpu_init(const int ntypes, double **cutsq, double **host_lj1,
                  const int nlocal, const int nall, const int max_nbors,
                  const int maxspecial, const double cell_size, int &gpu_mode,
                  FILE *screen);
-int lje_gpu_reinit(const int ntypes, double **cutsq, double **host_lj1,
+void lje_gpu_reinit(const int ntypes, double **cutsq, double **host_lj1,
                    double **host_lj2, double **host_lj3, double **host_lj4,
                    double **offset, double **shift);
 void lje_gpu_clear();