#127129 The above page is displayed many blank areas

When converting from unicode to GB2312GL, we need to clear 8bit. That is skipped
in patch for 101998. Add it back.
r=ftang, sr=alecf, a=asa

intl/uconv/ucvcn/nsGBKConvUtil.cpp

@@ -70,11 +70,11 @@ PRBool nsGBKConvUtil::UnicodeToGBKChar(
     {
       *aOutByte1 = item >> 8;
       *aOutByte2 = item & 0x00FF;
-      return PR_TRUE;
+      found = PR_TRUE;
     } else {
       return PR_FALSE;
     }
-  }
+  } else {
     // ugly linear search
     for( PRInt32 i = 0; i < MAX_GBK_LENGTH; i++ )
     {
@@ -86,6 +86,7 @@ PRBool nsGBKConvUtil::UnicodeToGBKChar(
         break;
       }
     }
+  }
   if(! found)
     return PR_FALSE;