[MSVCRT]: Implement and export _wtof, based on Wine and existing code; patch by Amine Khaldi.

CORE-12335 #resolve
CORE-9312 #comment Please retest with r73206

svn path=/trunk/; revision=73206

reactos/dll/win32/msvcrt/msvcrt.spec

@@ -761,7 +761,7 @@
 @ cdecl _wsystem(wstr)
 @ cdecl _wtempnam(wstr wstr)
 @ cdecl _wtmpnam(ptr)
-# @ cdecl _wtof(wstr)
+@ cdecl _wtof(wstr)
 @ cdecl _wtoi(wstr)
 @ cdecl _wtoi64(wstr)
 @ cdecl _wtol(wstr)

reactos/sdk/lib/crt/crt.cmake

@@ -305,6 +305,7 @@ list(APPEND CRT_SOURCE
     string/wcstombs_s.c
     string/wcstoul.c
     string/wctype.c
+    string/wtof.c
     string/wtoi.c
     string/wtoi64.c
     string/wtol.c

reactos/sdk/lib/crt/string/wtof.c

@@ -0,0 +1,10 @@
+#include <precomp.h>
+
+/*
+ * @implemented
+ */
+double
+_wtof(const wchar_t *str)
+{
+  return wcstod(str, 0);
+}