Fix last character being truncated in clipboard::copy_text due to off-by-one error (#262)

## Link to GitHub Issue, if one exists
n/a, user reported

## Description of change
When copying text to clipboard, the last character was being dropped due
to incorrect string buffer size calculation.

Also, clean up callers to just pass std:string by reference instead of
going back and forth between C-style strings.

Lastly, fix `git archive` in `build_all.sh` which broke after github
migration.

## Compiling
Yes

## Testing
Tested all three callers - IIDX cam hook, scard reader in Cards tab, and
patch manager datecode.

src/spice2x/build_all.sh

@@ -189,7 +189,7 @@ mkdir -p ${OUTDIR}/src
 if ((INCLUDE_SRC > 0))
 then
 	echo "Generating source file archive..."
-	git archive --format tar.gz --prefix=spice2x/ HEAD > ${OUTDIR}/src/spice2x-${GIT_BRANCH}.tar.gz 2>/dev/null || \
+	git archive --format tar.gz --prefix=spice2x/ HEAD ./ > ${OUTDIR}/src/spice2x-${GIT_BRANCH}.tar.gz 2>/dev/null || \
 		echo "WARNING: Couldn't get git to create the archive. Is this a git repository?"
 fi
 

src/spice2x/misc/clipboard.cpp

@@ -142,14 +142,14 @@ namespace clipboard {
         handle.detach();
     }
 
-    void copy_text(const std::string str) {
+    void copy_text(const std::string& str) {
         if (!OpenClipboard(nullptr)) {
             log_warning("clipboard", "Failed to open clipboard");
             return;
         }
 
-        HGLOBAL mem = GlobalAlloc(GMEM_MOVEABLE, str.length());
+        HGLOBAL mem = GlobalAlloc(GMEM_MOVEABLE, str.length() + 1);
-        memcpy(GlobalLock(mem), str.c_str(), str.length());
+        memcpy(GlobalLock(mem), str.c_str(), str.length() + 1);
         GlobalUnlock(mem);
 
         EmptyClipboard();

src/spice2x/misc/clipboard.h

@@ -4,6 +4,6 @@
 
 namespace clipboard {
     void copy_image(const std::filesystem::path path);
-    void copy_text(const std::string str);
+    void copy_text(const std::string& str);
     const std::string paste_text();
 }

src/spice2x/overlay/windows/camera_control.cpp

@@ -74,7 +74,7 @@ namespace overlay::windows {
         ImGui::SameLine();
         if (ImGui::Button("Copy")) {
             const auto s = selectedCamera->GetFriendlyName() + "\n" + selectedCamera->GetSymLink();
-            clipboard::copy_text(s.c_str());
+            clipboard::copy_text(s);
         }
 
         // Render parameters

src/spice2x/overlay/windows/config.cpp

@@ -2524,7 +2524,7 @@ namespace overlay::windows {
                         );
                     ImGui::SameLine();
                     if (ImGui::Button("Copy")) {
-                        clipboard::copy_text(card_str.c_str());
+                        clipboard::copy_text(card_str);
                     }
                     ImGui::SameLine();
                     if (ImGui::Button("Clear")) {

src/spice2x/overlay/windows/patch_manager.cpp

@@ -295,7 +295,7 @@ namespace overlay::windows {
         ImGui::Text("%s", avs::game::get_identifier().c_str());
         ImGui::SameLine();
         if (ImGui::Button("Copy")) {
-            clipboard::copy_text(identifiers.c_str());
+            clipboard::copy_text(identifiers);
         }
 
         ImGui::AlignTextToFramePadding();