Makefile: CUDA_INC to CUDA compiler instead of INC

Passing the parameter to MSVC compiler causes MinGW headers to be
used which causes compilation fail.

See:
https://github.com/CESNET/UltraGrid/actions/runs/2059190533

Author: MartinPulec

Makefile.in

@@ -15,7 +15,8 @@ CUDA_FLAGS    = @CUDA_FLAGS@ @CUDA_COMPUTE_ARGS@
 LDFLAGS      =  @LDFLAGS@
 LIBS         += @LIBS@ @MATHLIBS@ -lm -pthread
 INC           = -Isrc -I$(srcdir) -I$(srcdir)/src -I$(srcdir)/test -Idxt_compress \
-                @CUDA_INC@ @INC@
+                @INC@
+CUDA_INC      = @CUDA_INC@ -Isrc -I$(srcdir)/src
 DECKLINK_PATH = @DECKLINK_PATH@
 DYLIBBUNDLER  = @DYLIBBUNDLER@
 DYLIBBUNDLER_FLAGS += @DYLIBBUNDLER_FLAGS@
@@ -294,12 +295,12 @@ POSTPROCESS_DEPS = \
 # Pattern rule for compiling CUDA files
 %.o: %.cu
 	$(MKDIR_P) $(dir $@)
-	"$(CUDA_COMPILER)" $(CUDA_FLAGS) $(INC) -c $< -o $@
-	"$(CUDA_COMPILER)" $(CUDA_FLAGS) $(INC) -M $< > $*.d
+	"$(CUDA_COMPILER)" $(CUDA_FLAGS) $(CUDA_INC) -c $< -o $@
+	"$(CUDA_COMPILER)" $(CUDA_FLAGS) $(CUDA_INC) -M $< > $*.d
 	$(POSTPROCESS_DEPS)
 %.lib: %.cu
 	$(MKDIR_P) $(dir $@)
-	"$(CUDA_COMPILER)" $(CUDA_FLAGS) -DEXPORT_DLL_SYMBOLS $(INC) -MD --shared $< -o $*.dll
+	"$(CUDA_COMPILER)" $(CUDA_FLAGS) -DEXPORT_DLL_SYMBOLS $(CUDA_INC) -MD --shared $< -o $*.dll
 	touch $@
 	$(POSTPROCESS_DEPS)
 

configure.ac

@@ -2159,6 +2159,7 @@ then
 
         CUDA_INC="\"-I$CUDA_PATH/include\""
 	CUDA_COMPILER="$NVCC"
+        INC="$INC $CUDA_INC"
 
         if test $ac_cv_sizeof_int_p -eq 8 -a $system = Linux
         then