include stdint.h for int32_t/uint32_t

Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com>
Reviewed-by: Yong Bakos <ybakos@humanoriented.com>
diff --git a/shared/xalloc.h b/shared/xalloc.h
index 85fccb4..484de2d 100644
--- a/shared/xalloc.h
+++ b/shared/xalloc.h
@@ -30,6 +30,7 @@
 extern "C" {
 #endif
 
+#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>