Fix non-macos build

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

.clang-format

@@ -1,3 +0,0 @@
-DisableFormat: true
-SortIncludes: Never
-

source/backend/plugin/CarlaPluginVST3.cpp

@@ -3458,7 +3458,7 @@ public:
             binaryfilename += ".so";
            #endif
 
-            if (! water::File(binaryfilename).existsAsFile())
+            if (! water::File(binaryfilename.toRawUTF8()).existsAsFile())
             {
                 pData->engine->setLastError("Failed to find a suitable VST3 bundle binary");
                 return false;

source/discovery/carla-discovery.cpp

@@ -1583,7 +1583,7 @@ static bool do_vst3_check(lib_t& libHandle, const char* const filename, const bo
         binaryfilename += ".so";
        #endif
 
-        if (! water::File(binaryfilename).existsAsFile())
+        if (! water::File(binaryfilename.toRawUTF8()).existsAsFile())
         {
             DISCOVERY_OUT("error", "Failed to find a suitable VST3 bundle binary");
             return false;