Fix build without audio file support

Closes #962

Signed-off-by: falkTX <falktx@falktx.com>

source/includes/CarlaNativePrograms.hpp

@@ -54,10 +54,9 @@ struct NativePluginPresetManager {
     NativePluginPresetManager(const char* const paths, const char* const wildcard)
         : filenames()
     {
-        CARLA_SAFE_ASSERT_RETURN(paths != nullptr,);
         CARLA_SAFE_ASSERT_RETURN(wildcard != nullptr,);
 
-        if (paths[0] == '\0' || wildcard[0] == '\0')
+        if (paths == nullptr || paths[0] == '\0' || wildcard[0] == '\0')
             return;
 
         const StringArray splitPaths(StringArray::fromTokens(paths, CARLA_OS_SPLIT_STR, ""));

source/native-plugins/audio-file.cpp

@@ -31,6 +31,10 @@ static const char* const audiofilesWildcard =
   "*.flac;*.oga;*.ogg;*.w64;*.wav;"
 # endif
 #endif
+#if !defined(HAVE_SNDFILE) && !defined(HAVE_FFMPEG)
+# warning sndfile and ffmpeg libraries missing, no audio file support will be available
+""
+#endif
 ;
 
 // -----------------------------------------------------------------------

source/plugin/carla-lv2.cpp

@@ -784,6 +784,8 @@ protected:
         case NATIVE_HOST_OPCODE_HOST_IDLE:
         case NATIVE_HOST_OPCODE_INTERNAL_PLUGIN:
         case NATIVE_HOST_OPCODE_QUEUE_INLINE_DISPLAY:
+        case NATIVE_HOST_OPCODE_REQUEST_IDLE:
+        case NATIVE_HOST_OPCODE_GET_FILE_PATH:
             // nothing
             break;
 

source/plugin/carla-vst.cpp

@@ -772,6 +772,8 @@ protected:
         case NATIVE_HOST_OPCODE_UI_UNAVAILABLE:
         case NATIVE_HOST_OPCODE_INTERNAL_PLUGIN:
         case NATIVE_HOST_OPCODE_QUEUE_INLINE_DISPLAY:
+        case NATIVE_HOST_OPCODE_REQUEST_IDLE:
+        case NATIVE_HOST_OPCODE_GET_FILE_PATH:
             // nothing
             break;