ASMAPI#findFirstInstructionBefore ignores startIndex parameter

[Meldexun]

The method ASMAPI#findFirstInstructionBefore ignores the startIndex parameter and instead always starts searching from the end of the method.

CoreMods/src/main/java/net/minecraftforge/coremod/api/ASMAPI.java

Line 105 in c21a551

for (int i = Math.max(method.instructions.size() - 1, startIndex); i >= 0; i--) {

Math.max should be replaced with Math.min to fix this.