clean up after reading maps

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@43679 15284696-431f-4ddb-bdfa-cd5b030d7da7

raster/r.regression.line/main.c

@@ -104,6 +104,10 @@ int main(int argc, char *argv[])
 	    count++;
 	}
     }
+    Rast_close(map1_fd);
+    Rast_close(map2_fd);
+    G_free(map1_buf);
+    G_free(map2_buf);
 
     B = (sumXY - sumX * sumY / count) / (sumsqX - sumX * sumX / count);
     R = (sumXY - sumX * sumY / count) /