Stack size miscalculated with try-catch blocks

[Rafael Winterhalter]

Hello,

when testing a recent build of the JDK with my bridge to ASM, I encountered
some test failures. This is related to the stack size of a method being
calculated with an additional, unnecessary slot. This can be reproduced
using https://github.com/raphw/asm-jdk-bridge

This can also be reproduced by inspecting the computed stack for:

void c() {
    try {
        throw new RuntimeException();
    } catch (RuntimeException e) {
    }
}

which will be computed as 3 and not 2.

Best regards, Rafael
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