spelling: necessary

Signed-off-by: Josh Soref <[email protected]>

src/com/jpexs/decompiler/flash/console/help.txt

@@ -346,7 +346,7 @@ Pre-options:
     Values for <flaversion>: f5,mx,mx2004,f8,cs3,cs4,cs5,cs5.5,cs6,cc
     You can set multiple formats at once using comma (,)
     DO NOT PUT space between comma (,) and next value.
-    The prefix with colon (:) is neccessary.
+    The prefix with colon (:) is necessary.
 
 -cli
     Applies to: main

src/com/jpexs/decompiler/flash/gui/locales/MainFrame.properties

@@ -872,7 +872,7 @@ contextmenu.addScript.doinitaction = Add sprite init script - DoInitAction
 warning.cannotencrypt = WARNING: The file %file% was encrypted using HARMAN Air encryption.\r\nIt was successfully decrypted to be loaded, but if you want to save modified file later,\r\nthe encryption will be stripped ( = not encrypted).
 #after 18.5.0
 warning.edit.headerframecount = WARNING: Editing frame count in the header does not update \
- neccessary number of ShowFrame tags on SWF timeline.\r\nTo add new frames, you should better use right click context menu on SWF -> Add frames,\r\n\
+ necessary number of ShowFrame tags on SWF timeline.\r\nTo add new frames, you should better use right click context menu on SWF -> Add frames,\r\n\
  which will update the frame count in the header accordingly.
 warning.icon = Click to show related warning
 button.export = Export