Fix possible null deref in anal->fcns

Author: radare

libr/anal/anal.c

@@ -408,8 +408,10 @@ R_API void r_anal_trace_bb(RAnal *anal, ut64 addr) {
 
 R_API RList* r_anal_get_fcns(RAnal *anal) {
 	R_RETURN_VAL_IF_FAIL (anal, NULL);
-	// avoid received to free this thing
-	anal->fcns->free = NULL;
+	if (anal->fcns) {
+		// avoid received to free this thing
+		anal->fcns->free = NULL;
+	}
 	return anal->fcns;
 }