added patch from Nathanael

src/gribapi.h

@@ -67,6 +67,30 @@ static inline void *gribHandleNew(int editionNumber)
   return gh;
 }
 
+static inline int my_grib_set_double(grib_handle* h, const char* key, double val)
+{
+  if ( cdiGribApiDebug )
+    fprintf(stderr, "grib_set_double(\tgrib_handle* h, \"%s\", %f)\n", key, val);
+
+  return grib_set_double(h, key, val);
+}
+
+static inline int my_grib_set_long(grib_handle* h, const char* key, long val)
+{
+  if ( cdiGribApiDebug )
+    fprintf(stderr, "grib_set_long(  \tgrib_handle* h, \"%s\", %ld)\n", key, val);
+
+  return grib_set_long(h, key, val);
+}
+
+static inline int my_grib_set_string(grib_handle* h, const char* key, const char* val, size_t* length)
+{
+  if ( cdiGribApiDebug )
+    fprintf(stderr, "grib_set_string(\tgrib_handle* h, \"%s\", \"%s\")\n", key, val);
+
+  return grib_set_string(h, key, val, length);
+}
+
 static inline void gribHandleDelete(void *gh)
 {
   grib_handle_delete((struct grib_handle *)gh);

src/iterator_grib.c

@@ -535,6 +535,7 @@ void cdiGribIterator_readField(CdiIterator *super, double *buffer, size_t *nmiss
 {
   CdiGribIterator *me = (CdiGribIterator*)super;
 
+  GRIB_CHECK(my_grib_set_double((grib_handle *)me->gribHandle, "missingValue", cdiDefaultMissval), 0);
   gribGetDoubleArray((grib_handle *)me->gribHandle, "values", buffer);
   long gridType = gribGetLong((grib_handle *)me->gribHandle, "gridDefinitionTemplateNumber");
   if(nmiss)

src/stream_gribapi.c

@@ -46,33 +46,6 @@ typedef struct {
 
 
 #if  defined  (HAVE_LIBGRIB_API)
-static
-int my_grib_set_double(grib_handle* h, const char* key, double val)
-{
-  if ( cdiGribApiDebug )
-    fprintf(stderr, "grib_set_double(\tgrib_handle* h, \"%s\", %f)\n", key, val);
-
-  return grib_set_double(h, key, val);
-}
-
-static
-int my_grib_set_long(grib_handle* h, const char* key, long val)
-{
-  if ( cdiGribApiDebug )
-    fprintf(stderr, "grib_set_long(  \tgrib_handle* h, \"%s\", %ld)\n", key, val);
-
-  return grib_set_long(h, key, val);
-}
-
-static
-int my_grib_set_string(grib_handle* h, const char* key, const char* val, size_t* length)
-{
-  if ( cdiGribApiDebug )
-    fprintf(stderr, "grib_set_string(\tgrib_handle* h, \"%s\", \"%s\")\n", key, val);
-
-  return grib_set_string(h, key, val, length);
-}
-
 static
 int gribapiGetZaxisType(long editionNumber, int grib_ltype)
 {