cl_main: do not error on font registration in tty client

Do not error on font registration in tty client, RE_RegisterFont() is a stub always returning nullptr.

Author: illwieckz

src/engine/client/cl_main.cpp

@@ -2097,8 +2097,6 @@ bool CL_InitRenderer()
 return false;
 }
 
-fileHandle_t f;
-
 // this sets up the renderer and calls R_Init
 if ( !re.BeginRegistration( &cls.windowConfig ) )
 {
@@ -2109,6 +2107,9 @@ bool CL_InitRenderer()
 cl_consoleFontSize = Cvar_Get( "cl_consoleFontSize", "16", CVAR_LATCH );
 cl_consoleFontScaling = Cvar_Get( "cl_consoleFontScaling", "1", CVAR_LATCH );
 
+#if defined(BUILD_GRAPHICAL_CLIENT)
+fileHandle_t f;
+
 // Register console font specified by cl_consoleFont, if any
 // filehandle is unused but forces FS_FOpenFileRead() to heed purecheck because it does not when filehandle is nullptr
 if ( cl_consoleFont->string[0] )
@@ -2148,6 +2149,7 @@ bool CL_InitRenderer()
 
 FS_FCloseFile( f );
 }
+#endif
 
 cls.whiteShader = re.RegisterShader( "white", RSF_NOMIP );