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/de_DE.ISO8859-1/app-defaults/Dtimsstart.tmsg

@@ -22,106 +22,106 @@ $ *                         \ (at end of line)  continue on same line
 $ *
 $ *****************************************************************************
 $ ----------------------------------------------------------------------------
-$
+$ 
 $ font list
 1 -dt-interface user-medium-r-normal-m*-*-*-*-*-m-*:
-$
+$ 
 $ title bar title
 2 dtimsstart
-$
+$ 
 $ Selection title
 3 Eingabemethode-Auswahl
-$
+$ 
 $ Host title
 4 Rechner wechseln
-$
+$ 
 $ Mode title
 5 Eingabemethode-Auswahlmodus
-$
+$ 
 $ OK button label
 6 OK
-$
+$ 
 $ Clear button label
 7 Löschen
-$
+$ 
 $ Cancel button label
 8 Abbrechen
-$
+$ 
 $ Change Host button label
 9 Rechner wechseln
-$
+$ 
 $ Help button label
 10 Hilfe
-$
+$ 
 $ selection dialog border width
 11 3
-$
+$ 
 $ host dialog border width
 12 3
-$
+$ 
 $ XmDialogShell border width
 13 0
-$
+$ 
 $ cmd_rc default spacing (margin width)
 14 10
-$
+$ 
 $ cmd_rc default spacing 
 15 10
-$
+$ 
 $ Selection dialog cmd_rc (margin width)
 16 4
-$
+$ 
 $ Selection dialog OK margin width
 17 16
-$
+$ 
 $ Selection dialog cmd_rc default spacing 
 18 40
-$
+$ 
 $ Change Host dialog label
 19 Rechnername:
-$
+$ 
 $ Change Host dialog alignment
 20 XmALIGNMENT_BEGINNING
-$
+$ 
 $ Change Host dialog left margin
 21 20
-$
+$ 
 $ Change Host dialog right margin
 22 20
-$
+$ 
 $ Enter hostname label
 23  \
 Rechnernamen da eingeben, wo die registrierten\\n \
 Server zur Eingabemethode angezeigt werden sollen.\\n \
 Leeres Rechnernamensfeld verweist auf den lokalen Rechner.
-$
+$ 
 $ Host text max length
 24 63
-$
+$ 
 $ Host text number of columns
 25 14
-$
+$ 
 $ host_rc margin width
 26 60
-$
+$ 
 $ host cmd_rc margin width
 27 20
-$
+$ 
 $ host cmd_rc spacing
 28 90
-$
+$ 
 $ selection mode button0 label string
 29 Bei der Anmeldung fragen
-$
+$ 
 $ selection mode button1 label string
 30 Aktuelle Eingabemethode fortsetzen
-$
+$ 
 $ mode cmd_rc spacing
 31 50
-$
+$ 
 $ mode cmd_rc margin width
 32 20
-$
+$ 
 $ Input method selection help
 33 \\n \
         Hilfe zur Eingabemethode-Auswahl\\n \
@@ -148,7 +148,7 @@ $ Input method selection help
         ohne das Fenster zu wechseln.  Dafür führen Sie die Aktion\\n \
         'DtImsMode' unter Desktop_Werkzeuge im Anwendungsmanager aus,\\n \
         und wählen 'Aktuelle Eingabemethode fortsetzen' im Dialogfenster.\\n
-$
+$ 
 $ Input method selection mode help
 34 \\n \
         Eingabemethode Auswahlmodus\\n \
@@ -169,5 +169,5 @@ $ Input method selection mode help
       [Abbrechen]:    löscht die Änderungen und schließt das Fenster.\\n \
 \\n \
       [Hilfe]:      zeigt diese Nachricht an.\\n
-$
-$
+$ 
+$