message catalogs: fix comment lines, also remove linux hack in merge.c

According to the spec, blank lines in message catalogs or lines
beginning with '$ ' are valid comments.

However, there were many cases where lines in the message catalogs
contained just a single '$', without the required space after it.

Under linux, this caused 126766 error lines (in my builds) of the
form:

... unknown directive `': line ignored

This also causes gencat to exit with a non-0 exit code.  Even though
gencat says it ignores the line, it really doesn't.

An early porting change to programs/localized/util/merge.c was made to
ignore this return value on linux.  This hack has now been removed.

Build logs are a lot smaller and cleaner now.

cde/programs/localized/es_ES.ISO8859-1/msg/DtPrint.msg

@@ -26,32 +26,32 @@ $ *****************************************************************************
 $ *****************************************************************************
 
 $ *****************************************************************************
-$
+$ 
 $ ***** NOTE FOR MESSAGE CATALOG TRANSLATORS *****
-$
+$ 
 $ There MAY be three types of messages in this file:
-$
+$ 
 $  1. Messages that appear in dialogs or are displayed to the user.
-$
+$ 
 $     These messages are the default and they should ALL BE LOCALIZED.
 $     Note that these messages do NOT have any identification (see the
 $     comments for type 2 and 3 below).
-$
+$ 
 $  2. Messages that only appear in the DT error log file ($HOME/.dt/errorlog).
-$
+$ 
 $     The localization of these messages is OPTIONAL.  These messages are
 $     identified by the following:
-$
+$ 
 $  MESSAGES xx-yy IN SET zz WILL ONLY APPEAR IN THE DT ERRORLOG FILE
-$
+$ 
 $  3. Messages that should not be localized.
-$
+$ 
 $     These messages are identified by the following:
-$
+$ 
 $  DO NOT TRANSLATE or CHANGE or LOCALIZE MESSAGES xx-yy from set zz
-$
+$ 
 $ ***** END (NOTE FOR MESSAGE CATALOG TRANSLATORS) *****
-$
+$ 
 $ ******************************************************************************
 
 $quote "
@@ -66,12 +66,12 @@ $ ** 							     **
 $ *************************************************************
 $ Warning messages
 $ Note: do not localize the chars %s
-$
+$ 
 $quote
 1 Configuración del recurso workAreaLocation no válida.
 
 $ Label values
-$
+$ 
 2 Más impresoras...
 3 Imprimir en el archivo:
 4 Seleccionar archivo...
@@ -90,7 +90,7 @@ $ Note: do not localize the chars %s
 14 El modo de impresión no se puede cambiar.
 
 $ Label values
-$
+$ 
 15 Información...
 
 $ Warning messages
@@ -107,7 +107,7 @@ $ Note: do not localize the chars %s
 25 No se necesitan argumentos para efectuar la conversión de recursos.
 
 $ Label values
-$
+$ 
 26 Error de selección de impresora
 
 $ Warning messages
@@ -115,7 +115,7 @@ $ Note: do not localize the chars %s
 27 No se puede encontrar ninguna impresora.
 
 $ Label values
-$
+$ 
 28 La descripción no está disponible
 29 Seleccionar archivo
 30 Información de la impresora
@@ -133,9 +133,9 @@ $ ** 							     **
 $ ** _DtPrint Frame GUI messages			     **
 $ ** 							     ** 
 $ *************************************************************
-$
+$ 
 $ Label values for Margin Frame
-$
+$ 
 
 $quote "
 
@@ -144,9 +144,9 @@ $quote "
 3 "Derecho:"
 4 "Inferior:"
 5 "Izquierdo:"
-$
+$ 
 $ Label values for Header/Footer Frame
-$
+$ 
 6 "Encabezamientos y pies de página"
 7 "Izquierdo superior:"
 8 "Derecho superior:"
@@ -159,7 +159,7 @@ $ ** 							     **
 $ ** Dt Print Dialog Manager Job Options GUI messages        **
 $ ** 							     ** 
 $ *************************************************************
-$
+$ 
 
 $quote