fixed minor warning on unused variable in shell function

tests/fuzzer.c

@@ -248,7 +248,7 @@ static int FUZ_mallocTests(unsigned seed, double compressibility, unsigned part)
 
 static int FUZ_mallocTests(unsigned seed, double compressibility, unsigned part)
 {
-    (void)seed; (void)compressibility;
+    (void)seed; (void)compressibility; (void)part;
     return 0;
 }