db_perlvdb: remove inline to functions that break the symbol linking

(cherry picked from commit 8dc82f3ac87502dcf149f7b46367bfc3c45f2621)

src/modules/db_perlvdb/perlvdb_conv.c

@@ -92,7 +92,7 @@ AV *keys2perlarray(db_key_t* keys, int n) {
 	return array;
 }
 
-inline SV *valdata(db_val_t* val) {
+SV *valdata(db_val_t* val) {
 	SV *data = &PL_sv_undef;
 	const char* stringval;