varDefZtype: bug fix

ChangeLog

+2010-09-13  Uwe Schulzweida  <Uwe.Schulzweida@zmaw.de>
+
+	* using CGRIBEX library version 1.4.6
+	* Version 1.4.6 released
+
+2010-09-09  Uwe Schulzweida  <Uwe.Schulzweida@zmaw.de>
+
+	* varDefZtype: bug fix [report: Stephanie Legutke]
+	
 2010-09-07  Ralf Mueller <ralf.mueller@zmaw.de>
 
 	* use libtool 2.2.10 for compiling + linking
@@ -5,11 +14,6 @@
 	  (positions independant code)
 	* build CDI configuration file: cdi.settings
 
-2010-09-06  Uwe Schulzweida  <Uwe.Schulzweida@zmaw.de>
-
-	* using CGRIBEX library version 1.4.6
-	* Version 1.4.6 released
-
 2010-09-03  Uwe Schulzweida  <Uwe.Schulzweida@zmaw.de>
 
 	* check axis attribute (bug fix) [report: Cui Chen]

src/varscan.c

@@ -838,7 +838,8 @@ void varDefMissval(int varID, double missval)
 
 void varDefZtype(int varID, int ztype)
 {
-  vartable[varID].ztype = ztype;
+  if ( vartable[varID].ztype == COMPRESS_NONE )
+    vartable[varID].ztype = ztype;
 }