initialize GdkDragAction action to 0
This helps in silencing clang found warning
autilus-pathbar.c:759:9: error: variable 'action' is used uninitialized whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized] if (G_VALUE_HOLDS (value, GDK_TYPE_FILE_LIST)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Khem Raj raj.khem@gmail.com