tools: Fix uninitialized variable warnings for C raster tools

raster/r.coin/print_coin.c

@@ -32,7 +32,7 @@ int print_coin(int Conformat, int out_cols, int tofile)
     double colarea_no_0, rowarea_no_0;
     double area;
 
-    int addflag;
+    int addflag = 0;
     char topformat[133], midformat[133], namformat[133];
     char fillformat[133];
     const char *mapone;

raster/r.mapcalc/map3.c

@@ -265,7 +265,7 @@ static void translate_from_cats(map *m, CELL *cell, DCELL *xcell, int ncols)
 {
     struct Categories *pcats;
     BTREE *btree;
-    int i, idx;
+    int i = 0, idx = 0;
     CELL cat, key;
     double vbuf[1 << SHIFT];
     double *values;

raster/r.object.geometry/main.c

@@ -56,7 +56,7 @@ int main(int argc, char *argv[])
     } *obj_geos;
     double unit_area;
     int n_objects;
-    int planimetric, compute_areas;
+    int planimetric = 0, compute_areas = 0;
     struct Cell_head cellhd;
 
     G_gisinit(argv[0]);

raster/r.out.mpeg/main.c

@@ -235,7 +235,7 @@ static int load_files(void)
     register int i, rowoff, row, col, vxoff, vyoff, offset;
     int cnt, fd, size, tsiz, coff;
     int vnum;
-    int y_rows, y_cols;
+    int y_rows = 0, y_cols = 0;
     char *pr, *pg, *pb;
     unsigned char *tr, *tg, *tb, *tset;
     char *mpfilename, *name;

raster/r.sim/simlib/random.c

@@ -25,7 +25,7 @@ double gasdev(void)
     double ret_val;
 
     /* Local variables */
-    double r = 0., vv1, vv2, fac;
+    double r = 0.0, vv1 = 0.0, vv2 = 0.0, fac = 0.0;
 
     if (iset == 0) {
         while (r >= 1. || r == 0.) {
@@ -47,7 +47,7 @@ double gasdev(void)
 
 void gasdev_for_paralel(double *x, double *y)
 {
-    double r = 0., vv1, vv2, fac;
+    double r = 0.0, vv1 = 0.0, vv2 = 0.0, fac = 0.0;
 
     while (r >= 1. || r == 0.) {
         vv1 = simwe_rand() * 2. - 1.;

raster/r.spreadpath/path_finder.c

@@ -10,7 +10,7 @@
 
 void path_finder(int row, int col, int backrow, int backcol)
 {
-    int data, new_backrow, new_backcol;
+    int data = 0, new_backrow = 0, new_backcol = 0;
     extern char *value;
     extern int nrows, ncols;
     extern SEGMENT in_row_seg, in_col_seg, out_seg;

raster/r.statistics/o_kurt.c

@@ -17,7 +17,7 @@ int o_kurt(const char *basemap, const char *covermap, const char *outputmap,
 {
     struct Popen stats_child, reclass_child;
     FILE *stats, *reclass;
-    int first, i, count;
+    int first, i, count = 0;
     size_t mem;
     long basecat, covercat, catb, catc;
     double value, var, x;

raster/r.statistics/o_sdev.c

@@ -17,7 +17,7 @@ int o_sdev(const char *basemap, const char *covermap, const char *outputmap,
 {
     struct Popen stats_child, reclass_child;
     FILE *stats, *reclass;
-    int first, i, count;
+    int first, i, count = 0;
     size_t mem;
     long basecat, covercat, catb, catc;
     double value, sdev, x;

raster/r.statistics/o_skew.c

@@ -17,7 +17,7 @@ int o_skew(const char *basemap, const char *covermap, const char *outputmap,
 {
     struct Popen stats_child, reclass_child;
     FILE *stats, *reclass;
-    int first, i, count;
+    int first, i, count = 0;
     size_t mem;
     long basecat, covercat, catb, catc;
     double value, var, x;