Suppression of warnings in test building

[Vincent Béron]

Those are visible with -W in addition to -Wall, or in MSVC.

Changelog:
Suppress some signed/unsigned comparison warning.

Vincent
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--- wine/dlls/winmm/tests/wave.c	2002-11-04 18:47:49.000000000 -0500
+++ wine/dlls/winmm/tests/wave.c	2002-12-10 10:58:07.000000000 -0500
@@ -29,7 +29,7 @@
  */
 
 #define TEST_FORMATS 12
-static const int win_formats[TEST_FORMATS][4]={
+static const unsigned int win_formats[TEST_FORMATS][4]={
     {WAVE_FORMAT_1M08, 11025,  8, 1},
     {WAVE_FORMAT_1S08, 11025,  8, 2},
     {WAVE_FORMAT_1M16, 11025, 16, 1},