Fix MSVC's C2375 "redefinition with different linkage"

Apply Tcl's mechanism for reusing headers as internal and public API:
presence of a particular preprocessor definition (BUILD_tkblt) switches
declarations from specifying symbols "to be imported" or, alternatively,
"exporting".

1 files changed, 0 insertions, 2 deletions

diff --git a/configure b/configure
index 8e9f06f..4dd6f32 100755
--- a/configure
+++ b/configure
@@ -5770,8 +5770,6 @@ if test "windows" = "${TEA_PLATFORM}"; then
 
 fi
 
-
-
     vars="tkbltStubLib.C"
     for i in $vars; do
 	# check for existence - allows for generic/win/unix VPATH