Turn off cxx exception interception for now.

Makes the IR much easier to follow.  Also I think the plan will be
to have the cxx unwinder do the refcounting.

src/codegen/irgen/irgenerator.cpp

@@ -287,7 +287,7 @@ private:
         if (unw_info.exc_dest == NO_CXX_INTERCEPTION) {
             needs_cxx_interception = false;
         } else {
-            bool needs_refcounting_fixup = true;
+            bool needs_refcounting_fixup = false;
             needs_cxx_interception = (target_exception_style == CXX && (needs_refcounting_fixup || unw_info.hasHandler()
                                                                         || irstate->getExceptionStyle() == CAPI));
         }

src/codegen/irgen/refcounts.cpp

@@ -80,8 +80,8 @@ llvm::Instruction* findIncrefPt(llvm::BasicBlock* BB) {
 void addIncrefs(llvm::Value* v, int num_refs, llvm::Instruction* incref_pt) {
     if (num_refs > 1) {
         // Not bad but I don't think this should happen:
-        printf("Whoa more than one incref??\n");
-        raise(SIGTRAP);
+        //printf("Whoa more than one incref??\n");
+        //raise(SIGTRAP);
     }
 
     assert(num_refs > 0);