Fix ZeroMQ linking on Windows

Author: ferdnyc

src/CMakeLists.txt

@@ -330,8 +330,13 @@ find_package(ZeroMQ REQUIRED) # Creates libzmq target
 # others (Ubuntu) bundle them in with libzmq itself
 find_package(cppzmq QUIET) # Creates cppzmq target
 
-# Include ZeroMQ headers (needed for compile)
-target_link_libraries(openshot PUBLIC libzmq)
+# Link ZeroMQ (shared or static, whichever's found)
+if (TARGET libzmq)
+	target_link_libraries(openshot PUBLIC libzmq)
+elseif (TARGET libzmq-static)
+	target_link_libraries(openshot PRIVATE libzmq-static)
+endif()
+# Include cppzmq headers, if not bundled into libzmq
 if (TARGET cppzmq)
   target_link_libraries(openshot PUBLIC cppzmq)
 endif()