Created attachment 165034 [details] [review]
Fix + unit test

First of all : yes, I know, it's a regression I introduced over a year ago in commit 5d819beffba6d7f33f09317e4abdff2fa2450e93.

Right now gst_caps_normalize() doesn't expand/normalize if structures are added in some previous passes because we don't recalculate the new size of the newcaps.

This leads to the following problems :
input caps : some/type, foo=(string){ 1 , 2 }, bar=(string) { 3 }
normalized caps : some/type, foo=(string) 1, bar=(string) 3; some/type, foo=(string) 2, bar=(string) 3
actual current result : some/type, foo=(string) 1, bar=(string) 3; some/type, foo=(string) 2, bar=(string) { 3 }

Find attached fix and unit test.