Move GMIO_C_LINKAGE_BEGIN where really useful

src/gmio_core/endian.h

@@ -22,8 +22,6 @@
 
 #include "global.h"
 
-GMIO_C_LINKAGE_BEGIN
-
 /*! This enum identifies common endianness (byte order) of computer memory */
 enum gmio_endianness
 {
@@ -35,6 +33,8 @@ enum gmio_endianness
 
 typedef enum gmio_endianness gmio_endianness_t;
 
+GMIO_C_LINKAGE_BEGIN
+
 /*! Returns endianness (byte order) of the host's CPU architecture */
 GMIO_LIB_EXPORT gmio_endianness_t gmio_host_endianness();
 

src/gmio_core/error.h

@@ -22,7 +22,6 @@
 
 #include "global.h"
 
-GMIO_C_LINKAGE_BEGIN
 
 /*! This enum defines common errors */
 enum gmio_error
@@ -49,6 +48,8 @@ enum gmio_error
 
 typedef enum gmio_error gmio_error_t;
 
+GMIO_C_LINKAGE_BEGIN
+
 /*! Returns true if \p code == GMIO_NO_ERROR */
 GMIO_LIB_EXPORT gmio_bool_t gmio_no_error(int code);
 

src/gmio_stl/stl_format.h

@@ -23,8 +23,6 @@
 #include "stl_global.h"
 #include "../gmio_core/stream.h"
 
-GMIO_C_LINKAGE_BEGIN
-
 /*! This enums defines the various STL formats */
 enum gmio_stl_format
 {
@@ -36,6 +34,8 @@ enum gmio_stl_format
 
 typedef enum gmio_stl_format gmio_stl_format_t;
 
+GMIO_C_LINKAGE_BEGIN
+
 /*! Returns the format of the STL data in \p stream
  *
  *  It will try to read 512 bytes from \p stream into a buffer and then