Fix the class-memaccess warning

src/sfizz/modulations/ModKey.cpp

@@ -15,18 +15,26 @@ ModKey::Parameters::Parameters() noexcept
     // zero-fill the structure
     //  1. this ensures that non-used values will be always 0
     //  2. this makes the object memcmp-comparable
-    std::memset(this, 0, sizeof(*this));
+    std::memset(
+        static_cast<RawParameters*>(this),
+        0, sizeof(RawParameters));
 }
 
 ModKey::Parameters::Parameters(const Parameters& other) noexcept
 {
-    std::memcpy(this, &other, sizeof(*this));
+    std::memcpy(
+        static_cast<RawParameters*>(this),
+        static_cast<const RawParameters*>(&other),
+        sizeof(RawParameters));
 }
 
 ModKey::Parameters& ModKey::Parameters::operator=(const Parameters& other) noexcept
 {
     if (this != &other)
-        std::memcpy(this, &other, sizeof(*this));
+        std::memcpy(
+            static_cast<RawParameters*>(this),
+            static_cast<const RawParameters*>(&other),
+            sizeof(RawParameters));
     return *this;
 }
 

src/sfizz/modulations/ModKey.h

@@ -42,24 +42,7 @@ public:
     bool isTarget() const noexcept;
     std::string toString() const;
 
-    struct Parameters {
+    struct RawParameters {
-        Parameters() noexcept;
-        Parameters(const Parameters& other) noexcept;
-        Parameters& operator=(const Parameters& other) noexcept;
-
-        Parameters(Parameters&&) = delete;
-        Parameters &operator=(Parameters&&) = delete;
-
-        bool operator==(const Parameters& other) const noexcept
-        {
-            return std::memcmp(this, &other, sizeof(*this)) == 0;
-        }
-
-        bool operator!=(const Parameters& other) const noexcept
-        {
-            return std::memcmp(this, &other, sizeof(*this)) != 0;
-        }
-
         union {
             //! Parameters if this key identifies a CC source
             struct { uint16_t cc; uint8_t curve, smooth; float step; };
@@ -71,6 +54,28 @@ public:
         };
     };
 
+    struct Parameters : RawParameters {
+        Parameters() noexcept;
+        Parameters(const Parameters& other) noexcept;
+        Parameters& operator=(const Parameters& other) noexcept;
+
+        Parameters(Parameters&&) = delete;
+        Parameters &operator=(Parameters&&) = delete;
+
+        bool operator==(const Parameters& other) const noexcept
+        {
+            return std::memcmp(
+                static_cast<const RawParameters*>(this),
+                static_cast<const RawParameters*>(&other),
+                sizeof(RawParameters)) == 0;
+        }
+
+        bool operator!=(const Parameters& other) const noexcept
+        {
+            return !operator==(other);
+        }
+    };
+
 public:
     bool operator==(const ModKey &other) const noexcept
     {