Fix some compiler warnings

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

distrho/src/DistrhoDefines.h

@@ -193,6 +193,12 @@ private:                                         \
 # define DISTRHO_OS_SPLIT_STR ":"
 #endif
 
+/* MSVC warnings */
+#ifdef _MSC_VER
+# define strdup _strdup
+# pragma warning(disable:4244) /* possible loss of data */
+#endif
+
 /* Useful typedefs */
 typedef unsigned char uchar;
 typedef unsigned short int ushort;

distrho/src/DistrhoPluginInternal.hpp

@@ -249,7 +249,7 @@ public:
 
         /* Verify that virtual functions are overriden if parameters, programs or states are in use.
          * This does not work on all compilers, but we use it purely as informational check anyway. */
-#ifdef __GNUC__
+#if defined(__GNUC__) && !defined(__clang__)
 # ifdef DPF_ABORT_ON_ERROR
 #  define DPF_ABORT abort();
 # else