stream_gribapi: make bitsPerValue optional

config/default

@@ -17,6 +17,8 @@ case "${HOSTNAME}" in
                     --with-netcdf=/opt/local \
                     --with-hdf5=/opt/local \
                     --with-szlib=$HOME/local \
+                    --with-jasper=$HOME/local \
+                    --with-grib_api=$HOME/local/gribapi-1.9.5 \
 	            CC=gcc CFLAGS="-g -pipe -D_REENTRANT -Wall -W -Wfloat-equal -pedantic -O2 -Df2cFortran"
 	;;
 # ia64-nec-linux

src/stream_cdf.c

@@ -5420,7 +5420,7 @@ int cdfInqContents(int streamID)
   init_ncdims(ndims, ncdims);
   init_ncvars(nvars, ncvars);
 
-  /* read global attributtes*/
+  /* read global attributtes */
   for ( iatt = 0; iatt < ngatts; iatt++ )
     {
       cdf_inq_attname(fileID, NC_GLOBAL, iatt, attname);

src/stream_gribapi.c

@@ -847,12 +847,14 @@ void gribapiScanTimestep1(int streamID)
       printf("%d %d %d.%d.%d\n", vdate, vtime, pnum, pcat, pdis);
       */
 
-      GRIB_CHECK(grib_get_long(gh,"bitsPerValue", &lpar),0);
-      bitsPerValue = (int) lpar;
-      if ( bitsPerValue > 0 && bitsPerValue <= 32 )
-	prec = bitsPerValue;
-      else
-        prec = DATATYPE_PACK;
+      prec = DATATYPE_PACK;
+      status = grib_get_long(gh,"bitsPerValue", &lpar);
+      if ( status == 0 )
+	{
+	  bitsPerValue = (int) lpar;
+	  if ( bitsPerValue > 0 && bitsPerValue <= 32 )
+	    prec = bitsPerValue;
+	}
 
       if ( nrecs == 0 )
 	{