[pornpics] fix 'search' extractor pagination (#9022)

make stop condition more lenient

gallery_dl/extractor/pornpics.py

@@ -39,6 +39,7 @@ class PornpicsExtractor(Extractor):
             params = {"offset": 20}
 
         limit = params["limit"] = 20
+        limit //= 2
 
         headers = {
             "Accept": "application/json, text/javascript, */*; q=0.01",

test/results/pornpics.py

@@ -145,6 +145,15 @@ __tests__ = (
     "#class"   : pornpics.PornpicsSearchExtractor,
 },
 
+{
+    "#url"     : "https://www.pornpics.com/pornstars/paige-turnah/",
+    "#comment" : "results have less than 20 items per batch (#9022)",
+    "#class"   : pornpics.PornpicsSearchExtractor,
+    "#pattern" : pornpics.PornpicsGalleryExtractor.pattern,
+    "#range"   : "1-75",
+    "#count"   : 75,
+},
+
 {
     "#url"     : "https://www.pornpics.com/ass/",
     "#category": ("", "pornpics", "category"),