Fix a few pauses

VL1/content/VL1_why_haskell2.tex

@@ -2,7 +2,7 @@ From C++ std:
 \begin{cppcode}
 void pop();
 \end{cppcode}
-\slidep
+\pause
 From the C FLINT library:
 \begin{ccode}
 void fmpz_mod_poly_add(
@@ -11,7 +11,7 @@ void fmpz_mod_poly_add(
     const fmpz_mod_poly_t poly2);
 \end{ccode}
 \vspace{\baselineskip}
-\slidep
+\pause
 Regular C functions in real-world (omitting examples on purpose):
 \begin{itemizep}
 \item 100+ LOC

VL1/content/VL1_write_haskell4.tex

@@ -10,4 +10,5 @@ isZero x = False
 So if we pass it 0, we get True. If we do not pass 0, we get False and the value we passed gets basically ignored.
 \vspace{\baselineskip}
 \\
+\pause
 What might happen if we remove the second or the third line? What is a \textbf{partial function} and a \textbf{total function}?