error: statically allocate error symbol hash table

This will allow calling errSymbolAdd before errSymBld, therefore, a
function adding error symbols can now be run before iocInit or errlogInit

modules/libcom/src/error/errSymLib.c

@@ -39,7 +39,7 @@ typedef struct errnumnode {
     long               pad;
 } ERRNUMNODE;
 
-static ERRNUMNODE **hashtable;
+static ERRNUMNODE *hashtable[NHASH];
 static int initialized = 0;
 extern ERRSYMTAB_ID errSymTbl;
 
@@ -59,9 +59,6 @@ int errSymBld(void)
     if (initialized)
         return(0);
 
-    hashtable = (ERRNUMNODE**)callocMustSucceed
-        (NHASH, sizeof(ERRNUMNODE*),"errSymBld");
-
     for (i = 0; i < errSymTbl->nsymbols; i++, errArray++) {
         if (errSymbolAdd(errArray->errNum, errArray->name)) {
             fprintf(stderr, "errSymBld: ERROR - errSymbolAdd() failed \n");