[lldb] Add cast to fix compile error on 32-bit platforms

(cherry picked from commit f6012a2)

Author: adrian-prantl

lldb/source/DataFormatters/FormatterBytecode.cpp

@@ -339,7 +339,7 @@ llvm::Error Interpret(std::vector<ControlStackElement> &control,
     }
     case op_is_null: {
       TYPE_CHECK(Object);
-      data.Push(data.Pop<ValueObjectSP>() ? 0ULL : 1ULL);
+      data.Push(data.Pop<ValueObjectSP>() ? (uint64_t)0 : (uint64_t)1);
       continue;
     }
 
@@ -392,8 +392,6 @@ llvm::Error Interpret(std::vector<ControlStackElement> &control,
       int64_t x = data.Pop<int64_t>();                                         \
       if (y > 64)                                                              \
         return error("shift out of bounds");                                   \
-      if (y < 0)                                                               \
-        return error("shift out of bounds");                                   \
       data.Push(x OP y);                                                       \
     } else                                                                     \
       return error("unsupported data types");                                  \
@@ -551,7 +549,7 @@ llvm::Error Interpret(std::vector<ControlStackElement> &control,
       }
       case sel_strlen: {
         TYPE_CHECK(String);
-        data.Push(data.Pop<std::string>().size());
+        data.Push((uint64_t)data.Pop<std::string>().size());
         break;
       }
       case sel_fmt: {