Fix compiler warning
Fix compiler warning

ctx.c: In function 'sc_context_create':
ctx.c:646: warning: implicit declaration of function 'lt_dlinit'
ctx.c:646: warning: nested extern declaration of 'lt_dlinit'


git-svn-id: 444ed946b9c2220da791e84c3dd156a05f92db99@5255 c6295689-39f2-0310-b995-f0e70906c6a9

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