Add PLUGIN_USES_MULTI_PROGS to native hints; some comments

source/modules/CarlaNative.h

@@ -53,16 +53,17 @@ typedef enum {
 } NativePluginCategory;
 
 typedef enum {
-    PLUGIN_IS_RTSAFE           = 1 << 0,
-    PLUGIN_IS_SYNTH            = 1 << 1,
-    PLUGIN_HAS_UI              = 1 << 2,
-    PLUGIN_NEEDS_FIXED_BUFFERS = 1 << 3,
-    PLUGIN_NEEDS_SINGLE_THREAD = 1 << 4,
-    PLUGIN_NEEDS_UI_JUCE       = 1 << 5,
-    PLUGIN_NEEDS_UI_OPEN_SAVE  = 1 << 6,
-    PLUGIN_USES_PANNING        = 1 << 7, // uses stereo balance if unset (default)
-    PLUGIN_USES_STATE          = 1 << 8,
-    PLUGIN_USES_TIME           = 1 << 9
+    PLUGIN_IS_RTSAFE           = 1 <<  0,
+    PLUGIN_IS_SYNTH            = 1 <<  1,
+    PLUGIN_HAS_UI              = 1 <<  2,
+    PLUGIN_NEEDS_FIXED_BUFFERS = 1 <<  3,
+    PLUGIN_NEEDS_SINGLE_THREAD = 1 <<  4,
+    PLUGIN_NEEDS_UI_JUCE       = 1 <<  5,
+    PLUGIN_NEEDS_UI_OPEN_SAVE  = 1 <<  6,
+    PLUGIN_USES_MULTI_PROGS    = 1 <<  7, // has 1 patch per midi channel
+    PLUGIN_USES_PANNING        = 1 <<  8, // uses stereo balance if unset (default)
+    PLUGIN_USES_STATE          = 1 <<  9,
+    PLUGIN_USES_TIME           = 1 << 10
 } NativePluginHints;
 
 typedef enum {

source/utils/CarlaPipeUtils.hpp

@@ -45,7 +45,7 @@ protected:
     {
         carla_debug("CarlaPipeServer::CarlaPipeServer()");
 
-        fTmpBuf[0xff] = '\0';
+        carla_zeroChar(fTmpBuf, 0xff+1);
     }
 
     // -------------------------------------------------------------------
@@ -474,12 +474,14 @@ public:
     // -------------------------------------------------------------------
 
 protected:
+    // to possibly send errors somewhere
     virtual void fail(const char* const error)
     {
         carla_stderr2(error);
     }
 
-    virtual void msgReceived(const char* const msg) = 0;
+    // returns true if msg handled
+    virtual bool msgReceived(const char* const msg) = 0;
 
     // -------------------------------------------------------------------