[Bug 56171] New: Replace obsolete C_SRCS by SOURCES in Makefile.in

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=56171

Bug ID: 56171
           Summary: Replace obsolete C_SRCS by SOURCES in Makefile.in
           Product: Wine-staging
           Version: 9.0-rc5
          Hardware: x86-64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail], [e-mail]
      Distribution: ---

Since

commit acad49573a7846c0199ea3a8f1bd11c42d647ff4
Author: Alexandre Julliard 
Date:   Wed Nov 1 08:37:19 2023 +0100

makefiles: Always use the global SOURCES variable for .c files.

winehq.git has switched to using SOURCES instead of C_SRCS in Makefile.in
however wine-staging still uses C_SRCS in its patchsets that introduce new
modules or programs. That leads to build errors on some systems, but obviously
rare enough to stay unnoticed. It would be nice to get this fixed before final
9.0 release.