Fix compiler warnings

This fixes many warnings that look like:
cts/tests/tests/jni/libjnitest/macroized_tests.c:1027:20: warning:
passing an object that undergoes default argument promotion to
'va_start' has undefined behavior.

Just casting `int` casts to va_start isn't sufficient; it seems the
args themselves must be ints.

Bug: None
Test: mma shows no more warnings.
Change-Id: I4cbdec801e386ce65699190be4754605f31ee8c6
1 file changed