Update mid2agb source

Credit to @camthesaxman

tools/mid2agb/midi.cpp

@@ -52,7 +52,7 @@ static std::int32_t s_absoluteTime;
 static int s_blockCount = 0;
 static int s_minNote;
 static int s_maxNote;
-static int s_runningStatus = 0;
+static int s_runningStatus;
 
 void Seek(long offset)
 {
@@ -171,6 +171,7 @@ void StartTrack()
 {
     Seek(s_trackDataStart);
     s_absoluteTime = 0;
+    s_runningStatus = 0;
 }
 
 void SkipEventData()
@@ -182,20 +183,18 @@ void DetermineEventCategory(MidiEventCategory& category, int& typeChan, int& siz
 {
     typeChan = ReadInt8();
 
-    if (typeChan < 0x80 && s_runningStatus != 0)
+    if (typeChan < 0x80)
     {
+        // If data byte was found, use the running status.
+        ungetc(typeChan, g_inputFile);
         typeChan = s_runningStatus;
-        Skip(-1);
     }
-    
+
     if (typeChan == 0xFF)
     {
         category = MidiEventCategory::Meta;
         size = 0;
-    }
-    else if (typeChan >= 0xF8)
-    {
-        category = MidiEventCategory::Invalid;
+        s_runningStatus = 0;
     }
     else if (typeChan >= 0xF0)
     {
@@ -206,7 +205,6 @@ void DetermineEventCategory(MidiEventCategory& category, int& typeChan, int& siz
     else if (typeChan >= 0x80)
     {
         category = MidiEventCategory::Control;
-        s_runningStatus = typeChan;
 
         switch (typeChan >> 4)
         {
@@ -218,6 +216,7 @@ void DetermineEventCategory(MidiEventCategory& category, int& typeChan, int& siz
             size = 2;
             break;
         }
+        s_runningStatus = typeChan;
     }
     else
     {
@@ -434,7 +433,10 @@ bool CheckNoteEnd(Event& event)
 
 void FindNoteEnd(Event& event)
 {
+    // Save the current file position and running status
+    // which get modified by CheckNoteEnd.
     long startPos = ftell(g_inputFile);
+    int savedRunningStatus = s_runningStatus;
 
     event.param2 = 0;
 
@@ -442,6 +444,7 @@ void FindNoteEnd(Event& event)
         ;
 
     Seek(startPos);
+    s_runningStatus = savedRunningStatus;
 }
 
 bool ReadTrackEvent(Event& event)