[Linux] Allegro compilation issues

[JohnElliott]

I had a couple of issues compiling the current development tree on Linux, because of different function prototypes:

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void set_window_title(char *s); 

(ibm.h line 549): conflicts with Allegro's

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AL_INLINE(void, set_window_title, (AL_CONST char *name)

Adding 'const' to the prototype in src/ibm.h and src/win.c seems to fix that one.

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void hline(BITMAP *b, int x1, int y, int x2, uint32_t col);

(video.h line 95): conflicts with Allegro's

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AL_ALIAS_VOID_RET(hline(BITMAP *bmp, int x1, int y, int x2, int color)

Redeclaring the last parameter of hline() as int32_t fixes that one.

Linking doesn't work because Makefile.in needs updating -- running automake is sufficient.

[SarahWalker]

Should be fixed now.