fix: stub out FreeRDP unwind/debug.c with empty implementations instead of deleting

.gitea/workflows/build-release.yml

@@ -140,9 +140,14 @@ jobs:
           export CFLAGS="-w"
           export CXXFLAGS="-w"
 
-          # Remove unwind source — uses dlfcn.h which doesn't exist in MinGW
-          rm -rf winpr/libwinpr/utils/unwind
-          sed -i '/unwind/d' winpr/libwinpr/CMakeLists.txt 2>/dev/null || true
+          # Stub out unwind source — uses dlfcn.h which doesn't exist in MinGW
+          # Replace with empty implementations so cmake still finds the file
+          cat > winpr/libwinpr/utils/unwind/debug.c << 'STUBEOF'
+          #include <winpr/wtypes.h>
+          void* winpr_unwind_backtrace(void) { return NULL; }
+          char** winpr_unwind_backtrace_symbols(void* buffer, size_t* used) { *used = 0; return NULL; }
+          void winpr_unwind_backtrace_free(void* buffer) { }
+          STUBEOF
 
           cmake -B build -G Ninja \
             -DCMAKE_TOOLCHAIN_FILE=/tmp/mingw-toolchain.cmake \