Type mismatch corrections (Windows 64 bits)

This patch removes the type mismatch warnings revealed by Windows 64
compiler.  Wherever necessary, used size_t type for size related data.

Change-Id: Ie045ce95940cd83fe8d681168ac9526fc6028d43
Signed-off-by: Patrick Benavoli <patrick.benavoli@intel.com>
diff --git a/parameter/ConfigurableElement.h b/parameter/ConfigurableElement.h
index cce2227..18256cf 100644
--- a/parameter/ConfigurableElement.h
+++ b/parameter/ConfigurableElement.h
@@ -74,7 +74,7 @@
 
     // Owning domains
     void listAssociatedDomains(std::string& strResult, bool bVertical = true) const;
-    uint32_t getBelongingDomainCount() const;
+    size_t getBelongingDomainCount() const;
 
     // Elements with no domains
     void listRogueElements(std::string& strResult) const;