Import minor fixes from main branch

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

source/utils/CarlaRingBuffer.hpp

@@ -155,7 +155,7 @@ public:
 
         const uint32_t wrap((fBuffer->tail > fBuffer->wrtn) ? 0 : fBuffer->size);
 
-        return wrap + fBuffer->tail - fBuffer->wrtn;
+        return wrap + fBuffer->tail - fBuffer->wrtn - 1;
     }
 
     // -------------------------------------------------------------------

source/utils/CarlaStateUtils.cpp

@@ -249,7 +249,7 @@ void CarlaStateSave::clear() noexcept
     }
 
     uniqueId = 0;
-    options  = 0x0;
+    options  = PLUGIN_OPTIONS_NULL;
 
 #ifndef BUILD_BRIDGE_ALTERNATIVE_ARCH
     active = false;