[PATCH] configure: Use -Winit-self if possible.

[Zebediah Figura]

This protects against variable initialization like "int x = x". gcc apparently
treats this as an intentional way to suppress uninitialized or unused variable
warnings, but in my case it has caused at least one confusing bug.

Signed-off-by: Zebediah Figura <z.figura12(a)gmail.com>
---
 configure.ac | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/configure.ac b/configure.ac
index b282cc76657..534c7c2d965 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1045,6 +1045,7 @@ then
         WINE_TRY_CROSSCFLAGS([-Wdeclaration-after-statement])
         WINE_TRY_CROSSCFLAGS([-Wempty-body])
         WINE_TRY_CROSSCFLAGS([-Wignored-qualifiers])
+        WINE_TRY_CROSSCFLAGS([-Winit-self])
         WINE_TRY_CROSSCFLAGS([-Wpacked-not-aligned],[EXTRACROSSCFLAGS="$EXTRACROSSCFLAGS -Wno-packed-not-aligned"])
         WINE_TRY_CROSSCFLAGS([-Wpragma-pack],[EXTRACROSSCFLAGS="$EXTRACROSSCFLAGS -Wno-pragma-pack"])
         WINE_TRY_CROSSCFLAGS([-Wshift-overflow=2])
@@ -2025,6 +2026,7 @@ then
   WINE_TRY_CFLAGS([-Wdeclaration-after-statement])
   WINE_TRY_CFLAGS([-Wempty-body])
   WINE_TRY_CFLAGS([-Wignored-qualifiers])
+  WINE_TRY_CFLAGS([-Winit-self])
   WINE_TRY_CFLAGS([-Wpacked-not-aligned],[EXTRACFLAGS="$EXTRACFLAGS -Wno-packed-not-aligned"])
   WINE_TRY_CFLAGS([-Wpragma-pack],[EXTRACFLAGS="$EXTRACFLAGS -Wno-pragma-pack"])
   WINE_TRY_CFLAGS([-Wshift-overflow=2])
-- 
2.20.1