include: use double-quotes to include our own headers

In practice, this should only matter when there are multiple
header files with the same name. That is something we try
to avoid already, by giving headers a distinct name.

When building NetworkManager itself, we clearly want to use
double-quotes for including our own headers.
But we also want to do that in our public headers. For example:

  ./a.c
    #include <stdio.h>
    #include <nm-1.h>
    void main() {
        printf ("INCLUDED %s/nm-2.h\n", SYMB);
    }

  ./1/nm-1.h
    #include <nm-2.h>

  ./1/nm-2.h
    #define SYMB "1"

  ./2/nm-2.h
    #define SYMB "2"

$ cc -I./2 -I./1 ./a.c
$ ./a.out
INCLUDED 2/nm-2.h

Exceptions to this are
  - headers in "shared/nm-utils" that include <NetworkManager.h>. These
    headers are copied into projects and hence used like headers owned by
    those projects.
  - examples/C

1 files changed, 1 insertions, 1 deletions

diff --git a/libnm/nm-device-infiniband.h b/libnm/nm-device-infiniband.h
index 1f4ea217e4..38c81d9e69 100644
--- a/libnm/nm-device-infiniband.h
+++ b/libnm/nm-device-infiniband.h
@@ -25,7 +25,7 @@
 #error "Only <NetworkManager.h> can be included directly."
 #endif
 
-#include <nm-device.h>
+#include "nm-device.h"
 
 G_BEGIN_DECLS