Get ICU 4.6 to be compiled without RTTI....

third_party/icu/source/common/uniset_props.cpp

 /*
 *******************************************************************************
 *
 *   Copyright (C) 1999-2010, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 *
 *******************************************************************************
 *   file name:  uniset_props.cpp
 *   encoding:   US-ASCII
 *   tab size:   8 (not used)
@@ skipping 598 matching lines @@
                         literal = TRUE;
                         // Fall through to handle literal '-' below
                     } else {
                         chars.setPos(backup); // backup
                         continue;
                     }
                 }
             } else if (symbols != 0) {
                 const UnicodeFunctor *m = symbols->lookupMatcher(c);
                 if (m != 0) {
-                    const UnicodeSet *ms = dynamic_cast<const UnicodeSet *>(m);
+                    const UnicodeSet *ms = CR_DYNAMIC_CAST<const UnicodeSet *>(m);
                     if (ms == NULL) {
                         ec = U_MALFORMED_SET;
                         return;
                     }
                     // casting away const, but `nested' won't be modified
                     // (important not to modify stored set)
                     nested = const_cast<UnicodeSet*>(ms);
                     setMode = 3;
                 }
             }
@@ skipping 865 matching lines @@
 #endif
                 }
             }
             *this = foldSet;
         }
     }
     return *this;
 }
 
 U_NAMESPACE_END