Description:
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Trying to adopt classes fails when there are capitals in the code.

Reproduce code:
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Works:
class A { function ab() { print "a";} }
class B { function ab() { print "b";} }
runkit_class_adopt("B", "A");

Fails:
class A { function aB() { print "a";} }
class B { function aB() { print "b";} }
runkit_class_adopt("B", "A");

WIth: Error inheriting parent method: aB();

Commenting line 86 in runkit_class.c seems to fix this.