Corrected sector types in wld-files according last know good

lib/world/wld/234.wld

@@ -1006,7 +1006,7 @@ Inside Lake~
 water level barely covers the bottom of your feet.  You can see some ripples
 forming in the southwest.    
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-234 8 0 0 0 0
+234 8 0 0 0 7
 D0
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@@ -1026,7 +1026,7 @@ Inside Lake~
 rapidly.  There are some wakes coming from the south.  You wonder if you
 disturbed something.    
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-234 8 0 0 0 0
+234 8 0 0 0 7
 D0
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@@ -1050,7 +1050,7 @@ Inside Lake~
 The color of this @Ylake@n is undeterminable.  However, you do notice a small
 wake coming from the south east.    
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-234 8 0 0 0 0
+234 8 0 0 0 7
 D0
 ~
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@@ -1074,7 +1074,7 @@ Indoor Lake~
 arena.  How did this Lake get here?  It must have been made by someone or
 something.  This is definately not natural.    
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-234 8 0 0 0 0
+234 8 0 0 0 7
 D0
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@@ -1289,7 +1289,7 @@ The Source~
 to believe that there must be something alive in here.  You hear an odd noise.
   
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-234 8 0 0 0 0
+234 8 0 0 0 7
 D0
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