WIN32_THREADS -> WIN32

Fixes nasty bug where some parts of the code didn't define WIN32_THREADS
and were using the integer mutex implementation, causing even confusion
to the debuggers.

And there is little interest of other thread implemenation on Win32
besides Win32 threads.

src/mapi/glapi/SConscript

@@ -16,7 +16,6 @@ if env['platform'] != 'winddk':
         env.Append(CPPDEFINES = [
             '_GDI32_', # prevent gl* being declared __declspec(dllimport) in MS headers
             'BUILD_GL32', # declare gl* as __declspec(dllexport) in Mesa headers
-            'WIN32_THREADS', # use Win32 thread API
         ])
 
     env.Append(CPPPATH = [

src/mapi/glapi/gen/gl_x86-64_asm.py

@@ -138,7 +138,7 @@ class PrintGenericStubs(gl_XML.gl_print_base):
 		print '#  define GL_PREFIX(n) GLNAME(CONCAT(gl,n))'
 		print '# endif'
 		print ''
-		print '#if defined(PTHREADS) || defined(WIN32_THREADS) || defined(BEOS_THREADS)'
+		print '#if defined(PTHREADS) || defined(WIN32) || defined(BEOS_THREADS)'
 		print '#  define THREADS'
 		print '#endif'
 		print ''

src/mapi/glapi/gen/gl_x86_asm.py

@@ -78,7 +78,7 @@ class PrintGenericStubs(gl_XML.gl_print_base):
 		print '#define GLOBL_FN(x) GLOBL x'
 		print '#endif'
 		print ''
-		print '#if defined(PTHREADS) || defined(WIN32_THREADS) || defined(BEOS_THREADS)'
+		print '#if defined(PTHREADS) || defined(WIN32) || defined(BEOS_THREADS)'
 		print '#  define THREADS'
 		print '#endif'
 		print ''

src/mapi/glapi/glapi_x86-64.S

@@ -45,7 +45,7 @@
 #  define GL_PREFIX(n) GLNAME(CONCAT(gl,n))
 # endif
 
-#if defined(PTHREADS) || defined(WIN32_THREADS) || defined(BEOS_THREADS)
+#if defined(PTHREADS) || defined(WIN32) || defined(BEOS_THREADS)
 #  define THREADS
 #endif
 

src/mapi/glapi/glapi_x86.S

@@ -51,7 +51,7 @@
 #define GLOBL_FN(x) GLOBL x
 #endif
 
-#if defined(PTHREADS) || defined(WIN32_THREADS) || defined(BEOS_THREADS)
+#if defined(PTHREADS) || defined(WIN32) || defined(BEOS_THREADS)
 #  define THREADS
 #endif