build: partial libsndfile build fix (FSBUILD-180)

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@14330 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/libsndfile/src/common.h

@@ -39,7 +39,7 @@
 
 #if (SIZEOF_LONG == 8)
 #	define	SF_PLATFORM_S64(x)		x##l
-#elif COMPILER_IS_GCC
+#elif COMPILER_IS_GCC || __SUNPRO_C
 #	define	SF_PLATFORM_S64(x)		x##ll
 #elif OS_IS_WIN32
 #	define	SF_PLATFORM_S64(x)		x##I64