Change Get|SetNumChildren to use unint32_t

(cherry picked from commit 7fc583c)

Author: adrian-prantl

lldb/include/lldb/Core/ValueObject.h

@@ -485,7 +485,7 @@ class ValueObject {
 
   virtual size_t GetIndexOfChildWithName(llvm::StringRef name);
 
-  size_t GetNumChildren(uint32_t max = UINT32_MAX);
+  uint32_t GetNumChildren(uint32_t max = UINT32_MAX);
 
   const Value &GetValue() const { return m_value; }
 
@@ -974,7 +974,7 @@ class ValueObject {
   /// Should only be called by ValueObject::GetNumChildren().
   virtual uint32_t CalculateNumChildren(uint32_t max = UINT32_MAX) = 0;
 
-  void SetNumChildren(size_t num_children);
+  void SetNumChildren(uint32_t num_children);
 
   void SetValueDidChange(bool value_changed) {
     m_flags.m_value_did_change = value_changed;

lldb/source/Core/ValueObject.cpp

@@ -546,7 +546,7 @@ ValueObjectSP ValueObject::GetChildMemberWithName(llvm::StringRef name,
   return child_sp;
 }
 
-size_t ValueObject::GetNumChildren(uint32_t max) {
+uint32_t ValueObject::GetNumChildren(uint32_t max) {
   UpdateValueIfNeeded();
 
   if (max < UINT32_MAX) {
@@ -576,7 +576,7 @@ bool ValueObject::MightHaveChildren() {
 }
 
 // Should only be called by ValueObject::GetNumChildren()
-void ValueObject::SetNumChildren(size_t num_children) {
+void ValueObject::SetNumChildren(uint32_t num_children) {
   m_flags.m_children_count_valid = true;
   m_children.SetChildrenCount(num_children);
 }