Update FindwxWidgets.cmake to support recent msys/mingw versions.

Changes are msys specific.

cmake/FindwxWidgets.cmake

@@ -866,17 +866,40 @@ else()
               OUTPUT_STRIP_TRAILING_WHITESPACE
               ERROR_QUIET
               )
+
             if(_retv EQUAL 0)
               file(TO_CMAKE_PATH ${_native_path} _native_path)
               DBG_MSG_V("Path ${_path} converted to ${_native_path}")
               set(_tmp_path "${_tmp_path} ${_native_path}")
             endif()
           endforeach()
+
         DBG_MSG("Setting wxWidgets_INCLUDE_DIRS = ${_tmp_path}")
         set(wxWidgets_INCLUDE_DIRS ${_tmp_path})
         separate_arguments(wxWidgets_INCLUDE_DIRS)
         list(REMOVE_ITEM wxWidgets_INCLUDE_DIRS "")
+
+        set(_tmp_path "")
+        foreach(_path ${wxWidgets_LIBRARY_DIRS})
+          execute_process(
+            COMMAND cygpath -w ${_path}
+            OUTPUT_VARIABLE _native_path
+            RESULT_VARIABLE _retv
+            OUTPUT_STRIP_TRAILING_WHITESPACE
+            ERROR_QUIET
+            )
+          if(_retv EQUAL 0)
+            file(TO_CMAKE_PATH ${_native_path} _native_path)
+            DBG_MSG_V("Path ${_path} converted to ${_native_path}")
+            string(APPEND _tmp_path " ${_native_path}")
+          endif()
+        endforeach()
+        DBG_MSG("Setting wxWidgets_LIBRARY_DIRS = ${_tmp_path}")
+        set(wxWidgets_LIBRARY_DIRS ${_tmp_path})
+        separate_arguments(wxWidgets_LIBRARY_DIRS)
+        list(REMOVE_ITEM wxWidgets_LIBRARY_DIRS "")
       endif()
+
     endif()
 #=====================================================================
 # Neither UNIX_FIND_STYLE, nor WIN32_FIND_STYLE