Use range instead of the generic uint32 method to use less bytes when generating necessary numbers.

tests/fuzz/fuzz_data_producer.c

@@ -52,6 +52,17 @@ uint32_t FUZZ_dataProducer_uint32(FUZZ_dataProducer_t *producer) {
     return FUZZ_dataProducer_uint32Range(producer, 0, 0xffffffff);
 }
 
+int32_t FUZZ_dataProducer_int32Range(FUZZ_dataProducer_t *producer,
+                                    int32_t min, int32_t max)
+{
+    FUZZ_ASSERT(min <= max);
+
+    if (min < 0)
+      return (int)FUZZ_dataProducer_uint32Range(producer, 0, max - min) + min;
+
+    return FUZZ_dataProducer_uint32Range(producer, min, max);
+}
+
 size_t FUZZ_dataProducer_remainingBytes(FUZZ_dataProducer_t *producer){
     return producer->size;
 }