fix the Memory leak: ret (#4038)

When the opsize is greater than 2 and memory allocation is successful, it will cause a memory leak

Signed-off-by: zengwei [email protected]

librz/analysis/p/analysis_avr.c

@@ -379,6 +379,7 @@ static ut8 *analysis_mask_avr(RzAnalysis *analysis, int size, const ut8 *data, u
 	rz_strbuf_fini(&sb);
 
 	if (opsize < 2 || !(ret = malloc(opsize))) {
+		free(ret);
 		rz_analysis_op_free(op);
 		return NULL;
 	}