fix: preprocessor #elif no longer skips whole file

When an #elif branch evaluates to true, after the next #endif the rest of the whole files #define, #undef and #include statements would not be parsed. Now those are correctly parsed.

Author: AljenU

fortls/parse_fortran.py

@@ -2142,6 +2142,7 @@ def replace_vars(line: str):
                 else:
                     if eval_pp_if(line[match.end(1) :], defs_tmp):
                         pp_stack[-1][1] = i - 1
+                        pp_skips.append(pp_stack.pop())
                         pp_stack.append([-1, -1])
                         inc_start = True
             elif match.group(1) == "else":