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/zh_TW.dt-eucTW/msg/DtHelp.msg

@@ -40,13 +40,13 @@ $ *************************************<+>*************************************
 
 $set 2
 $ *****  Module: HelpDialog.c  and a few from HelpQuickD.c *****
-$
+$ 
 $ These Messages appear in the pulldown menus for Cde Help General Help
 $ dialog widget.
-$
+$ 
 $ They come in pairs where the first is the menu name (e.g. 1 Print...) and the
 $ second is the mnemonic (e.g. 2 P).  
-$
+$ 
 $ Messages 1 through 6 are the pulldown menus for the File menu.
 1 悄峭(P)...
 2 P
@@ -80,7 +80,7 @@ $ Messages 17 through 28 are the pulldown menus for the Help menu.
 26 M
 27 <20>王牒煞氅忘(A)
 28 A
-$
+$ 
 $ Messages 29 through 36 are the menu labels and mnemonics for for the 
 $ Help Dialog.
 29 篁争(F)
@@ -93,10 +93,10 @@ $ Help Dialog.
 36 H
 37 罹蛞(E)
 38 E
-$
-$
+$ 
+$ 
 $ >>>>> Skip #39 through #49
-$
+$ 
 $ Messages 50 through 55 are used to display formatting errors within the
 $ helps dialog and quick help dialog widgets.
 $ 
@@ -108,29 +108,29 @@ $
 岩呢浯溱·
 54 牒煞氅忘配黝嘁挝知娶脓·
 55 骗悄 ID 软弭拟囚倾〃
-$
+$ 
 $ Messages 56 and 67 are displayed when a hypertext link type is selected but
 $ not supported within the current application.
-$
+$ 
 56 菡远筌祁幔娶拟排呶诶驮蛸探嘻饩牌求葙岣·
 57 菡远筌祁幔娶拟排呶葙岣罾母呶煞喻劈卒·
-$
+$ 
 $ Messages 58 through 62  are used when bad or null help volumes or 
 $ locationId's are used.
-$
+$ 
 58 诶腈友嘻罾母牒煞氅忘偏卒属却区嬉、托栖软王锼宓嘻洳掾纣绽母·却<C2B7>区嬉罾母牒煞氅忘嘻骜毓、铢俣扔塄新嘻氅忘牌堑·\n
 59 栖牙贴 ID 软弭·
 60 栖牙贴牒煞氅忘诈<E5BF98>·
 61 牒煞氅忘诈<E5BF98>〃
 62 ID 软弭〃
-$
+$ 
 $ >>>>> Skip #63 through #69
-$
-$
+$ 
+$ 
 $ Message 70 is used when a null value for DtNtopicTitle is used.
-$
+$ 
 70 群配黝砗黝拟囚倾·
-$
+$ 
 $ $ New messages added after early msg cat freeze; not in order
 80 牙贴嘻牒煞氅忘<E6B085>形嘁真·