util_proc: Fix memory allocation error messages

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
---
 libutil/util_proc.c |    7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

--- a/libutil/util_proc.c
+++ b/libutil/util_proc.c
@@ -54,8 +54,7 @@ util_proc_read_special_file(const char *
 	count = 0;
 	data = (char *) malloc(current_size);
 	if (data == NULL) {
-		printf("Could not allocate %lld bytes of memory",
-		       (unsigned long long) size);
+		printf("Could not allocate %zu bytes of memory", current_size);
 		fclose(file);
 		return -1;
 	}
@@ -69,8 +68,8 @@ util_proc_read_special_file(const char *
 		if (count >= current_size) {
 			new_data = (char *) malloc(current_size * 2);
 			if (new_data == NULL) {
-				printf("Could not allocate %lld bytes of memory",
-				       (unsigned long long) size);
+				printf("Could not allocate %zu bytes of memory",
+				       current_size * 2);
 				free(data);
 				fclose(file);
 				return -1;