Fix parameter types for WIN32 CipCalloc().

These were missed in daebe7b. Resolves compiler warnings about parameter
type mismatches.

source/src/ports/WIN32/sample_application/sampleapplication.c

@@ -186,8 +186,8 @@ EipStatus ResetDeviceToInitialConfiguration(void) {
 }
 
 void *
-CipCalloc(unsigned pa_nNumberOfElements,
-          unsigned pa_nSizeOfElement) {
+CipCalloc(size_t pa_nNumberOfElements,
+          size_t pa_nSizeOfElement) {
   return calloc(pa_nNumberOfElements, pa_nSizeOfElement);
 }