winedos: Declare some functions static

[Andrew Talbot]

Changelog:
    winedos: Declare some functions static.

diff --git a/dlls/winedos/dosexe.h b/dlls/winedos/dosexe.h
index 2ba0735..023d691 100644
--- a/dlls/winedos/dosexe.h
+++ b/dlls/winedos/dosexe.h
@@ -407,8 +407,6 @@ extern void WINAPI DOSVM_Int3eHandler(CONTEXT86*);
 
 /* himem.c */
 extern void DOSVM_InitSegments(void);
-extern LPVOID DOSVM_AllocUMB(DWORD);
-extern LPVOID DOSVM_AllocCodeUMB(DWORD, WORD *, WORD *);
 extern LPVOID DOSVM_AllocDataUMB(DWORD, WORD *, WORD *);
 
 /* int09.c */
diff --git a/dlls/winedos/himem.c b/dlls/winedos/himem.c
index 3dcc103..a7d6099 100644
--- a/dlls/winedos/himem.c
+++ b/dlls/winedos/himem.c
@@ -66,7 +66,7 @@ static DWORD DOSVM_umb_free = DOSVM_UMB_BOTTOM;
  * overhead. Use of this routine also preserves precious DOS
  * conventional memory.
  */
-LPVOID DOSVM_AllocUMB( DWORD size )
+static LPVOID DOSVM_AllocUMB( DWORD size )
 {
   LPVOID ptr = (LPVOID)DOSVM_umb_free;
   
@@ -113,7 +113,7 @@ static WORD alloc_selector( void *base, DWORD size, unsigned char flags )
  *
  * FIXME: should allocate a single PM selector for the whole UMB range.
  */
-LPVOID DOSVM_AllocCodeUMB( DWORD size, WORD *segment, WORD *selector )
+static LPVOID DOSVM_AllocCodeUMB( DWORD size, WORD *segment, WORD *selector )
 {
   LPVOID ptr = DOSVM_AllocUMB( size );