r3.info: attempt to fix https://trac.osgeo.org/grass/ticket/2357 (r3.info crash on Windows)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@61172 15284696-431f-4ddb-bdfa-cd5b030d7da7

raster3d/r3.info/r3.info.main.c

@@ -490,7 +490,7 @@ int main(int argc, char *argv[])
 int format_double(double value, char *buf)
 {
 
-    sprintf(buf, "%.8lf", value);
+    sprintf(buf, "%.8f", value);
     G_trim_decimal(buf);
     return 0;
 }