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

third_party/icu/source/common/normalizer2.cpp

Index: third_party/icu/source/common/normalizer2.cpp
===================================================================
--- third_party/icu/source/common/normalizer2.cpp	(revision 74230)
+++ third_party/icu/source/common/normalizer2.cpp	(working copy)
@@ -660,7 +660,7 @@
     // length==0: Nothing to do, and n2wi->normalize(NULL, NULL, buffer, ...) would crash.
     if(length!=0) {
         const Normalizer2 *n2=(const Normalizer2 *)norm2;
-        const Normalizer2WithImpl *n2wi=dynamic_cast<const Normalizer2WithImpl *>(n2);
+        const Normalizer2WithImpl *n2wi=CR_DYNAMIC_CAST<const Normalizer2WithImpl *>(n2);
         if(n2wi!=NULL) {
             // Avoid duplicate argument checking and support NUL-terminated src.
             ReorderingBuffer buffer(n2wi->impl, destString);
@@ -696,7 +696,7 @@
     // secondLength==0: Nothing to do, and n2wi->normalizeAndAppend(NULL, NULL, buffer, ...) would crash.
     if(secondLength!=0) {
         const Normalizer2 *n2=(const Normalizer2 *)norm2;
-        const Normalizer2WithImpl *n2wi=dynamic_cast<const Normalizer2WithImpl *>(n2);
+        const Normalizer2WithImpl *n2wi=CR_DYNAMIC_CAST<const Normalizer2WithImpl *>(n2);
         if(n2wi!=NULL) {
             // Avoid duplicate argument checking and support NUL-terminated src.
             ReorderingBuffer buffer(n2wi->impl, firstString);