i915g: Fix warnings

src/gallium/drivers/i915/i915_debug.c

@@ -880,7 +880,7 @@ i915_dump_batchbuffer( struct intel_batchbuffer *batch )
       return;
    }
    
-   debug_printf( "\n\nBATCH: (%d)\n", bytes / 4);
+   debug_printf( "\n\nBATCH: (%d)\n", (int)bytes / 4);
 
    while (!done &&
 	  stream.offset < bytes)

src/gallium/drivers/i915/i915_fpc_translate.c

@@ -127,7 +127,7 @@ i915_program_error(struct i915_fp_compile *p, const char *msg, ...)
    va_start( args, msg );  
    util_vsnprintf( buffer, sizeof(buffer), msg, args );
    va_end( args );
-   debug_printf(buffer);
+   debug_printf("%s", buffer);
    debug_printf("\n");
 
    p->error = 1;