Midi1SysExChunkProcessor: Make sure to reset pending inputs.

This should fix #81 (comment)

ktmidi/src/commonMain/kotlin/dev/atsushieno/ktmidi/Midi1SysExChunkProcessor.kt

@@ -12,6 +12,7 @@ class Midi1SysExChunkProcessor {
                 remaining.addAll(input)
             else {
                 yield(remaining + input.take(f7Pos + 1))
+                remaining.clear()
                 // process the remaining recursively
                 yieldAll(process(input.drop(f7Pos + 1)))
             }

ktmidi/src/commonTest/kotlin/dev/atsushieno/ktmidi/Midi1SysExChunkProcessorTest.kt

@@ -0,0 +1,25 @@
+package dev.atsushieno.ktmidi
+
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+import kotlin.test.assertFalse
+
+class Midi1SysExChunkProcessorTest {
+    @Test
+    fun process1() {
+        val processor = Midi1SysExChunkProcessor()
+        (1..3).forEach {
+            val sysex = listOf(0xF0,
+                // invalidate MUID example
+                0x7E, 0x7F, 0x0D, 0x7E, 1,
+                0x10, 0x10, 0x10, 0x10, 0x7F, 0x7F, 0x7F, 0x7F, 0x20, 0x20, 0x20, 0x20,
+                0xF7).map { it.toByte() }
+            val seq1 = processor.process(sysex.take(10)).flatMap { it }
+            // The inputs are still stored.
+            assertFalse(seq1.iterator().hasNext(), "round $it: #1")
+            val seq2 = processor.process(sysex.drop(10)).flatMap { it }
+            // the pending inputs are flushed now (and should not remain: https://github.com/atsushieno/ktmidi/issues/81#issuecomment-2253261161)
+            assertContentEquals(sysex, seq2.toList(), "round $it: #2")
+        }
+    }
+}