v.surf.idw: fix applying mask (#2383)

petrasovaa · web-flow · commit 0b2215527b75 · 2022-05-19T23:16:41.000-04:00
Fixes https://trac.osgeo.org/grass/ticket/3677
diff --git a/vector/v.surf.idw/main.c b/vector/v.surf.idw/main.c
@@ -280,7 +280,7 @@ int main(int argc, char *argv[])
         for (col = 0; col < window.cols; col++) {
             east += window.ew_res;
             /* don't interpolate outside of the mask */
-            if (mask && mask[col] == 0) {
+            if (mask && (mask[col] == 0 || Rast_is_c_null_value(&mask[col]))) {
                 Rast_set_d_null_value(&dcell[col], 1);
                 continue;
             }

Original file line number	Diff line number	Diff line change
`@@ -280,7 +280,7 @@ int main(int argc, char *argv[])`
`280`	`280`	`for (col = 0; col < window.cols; col++) {`
`281`	`281`	`east += window.ew_res;`
`282`	`282`	`/* don't interpolate outside of the mask */`
`283`		`- if (mask && mask[col] == 0) {`
	`283`	`+ if (mask && (mask[col] == 0 \|\| Rast_is_c_null_value(&mask[col]))) {`
`284`	`284`	`Rast_set_d_null_value(&dcell[col], 1);`
`285`	`285`	`continue;`
`286`	`286`	`}`