Default problems with msvc.

src/gpu/VirtualFluids_GPU/Kernel/KernelImp.cpp

@@ -22,4 +22,6 @@ void KernelImp::setCheckParameterStrategy(std::shared_ptr<CheckParameterStrategy
     this->checkStrategy = strategy;
 }
 
-KernelImp::KernelImp(std::shared_ptr<Parameter> para, int level) : para(para), level(level) {}
\ No newline at end of file
+KernelImp::KernelImp(std::shared_ptr<Parameter> para, int level) : para(para), level(level) {}
+
+KernelImp::KernelImp() {}
\ No newline at end of file

src/gpu/VirtualFluids_GPU/Kernel/KernelImp.h

@@ -23,7 +23,7 @@ public:
 
 protected:
     KernelImp(std::shared_ptr<Parameter> para, int level);
-    KernelImp() = default;
+    KernelImp();
 
     std::shared_ptr<Parameter> para;
     std::shared_ptr<CheckParameterStrategy> checkStrategy;