util: Add extern c to u_dynarray.h

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>

src/util/u_dynarray.h

@@ -30,6 +30,10 @@
 #include <stdlib.h>
 #include "ralloc.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* A zero-initialized version of this is guaranteed to represent an
  * empty array.
  *
@@ -134,5 +138,9 @@ util_dynarray_trim(struct util_dynarray *buf)
    for (type *elem = (type *)(buf)->data; \
         elem < (type *)((char *)(buf)->data + (buf)->size); elem++)
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* U_DYNARRAY_H */