Apply the fix from @pointbre in issue #626 to skip "inline" on AIX, but invert the test to make it a little easier to understand.

linkhash.h

@@ -311,11 +311,11 @@ int lh_table_resize(struct lh_table *t, int new_size);
 /**
  * @deprecated Don't use this outside of linkhash.h:
  */
-#if !defined(_MSC_VER) || (_MSC_VER > 1800)
+#if (defined(AIX_CC) || (defined(_MSC_VER) && (_MSC_VER <= 1800)) )
 /* VS2010 can't handle inline funcs, so skip it there */
-#define _LH_INLINE inline
-#else
 #define _LH_INLINE
+#else
+#define _LH_INLINE inline
 #endif
 
 /**