--- OpenCL/h_extract	2012/05/05 17:09:19	1.11
+++ OpenCL/h_extract	2012/05/07 01:00:31	1.12
@@ -42,11 +42,11 @@
       perl -ne 'print "const_iv($1)\n" if !/#define CL_BUILD_(?:NONE|ERROR|IN_PROGRESS)/ && /^#define CL_(\S+)\s+-\d+\s*$/'
 ) >errstr.h
 
-# default constant values to -1
+# default constant values to 0
 (
    echo '// autogenerated by h_extract'
    cat constiv.h |
-      perl -ne '/const_iv\((.*)\)/ or next; print "#ifndef CL_$1\n#define CL_$1 -1\n#endif\n"'
+      perl -ne '/const_iv\((.*)\)/ or next; print "#ifndef CL_$1\n#define CL_$1 0\n#endif\n"'
 ) >default.h
 
 # *glGet*Info